[Desire Q&A, Help & Troubleshooting] Aragornhr:
Well, here we go:

1) Unzip ROM wherever you want. When done, you should see a few folders (data,META-INF,system) and a few files (boot.img, changelog.txt)

2) Create a new folder here called sd-ext

3) Go into sd-ext and create two new folders called, app_s and framework_s

4) Now, go into system folder, and copy all contents of app folder (/system/app) into sd-ext/app_s. Remove /system/app folder

5) Do the same with framework folder. Copy all contents into sd-ext/framework_s and remove /system/framework.

6) Now, go into /system/etc/init.d. Remove all files except 40a2sd and 99complete.

7) Edit 40a2sd script in notepad. You can use this if you want:

#!/system/bin/sh
#
# Apps2SD using symlinks and bind mounts
# shade@chemlab.org (cyanogen)
# Adapted by Teknologist

#Removed this as there is no /etc/sysctl.conf as of now in MCR
/system/bin/strt

# execute any postinstall script then kill it
if [ -e /dev/block/mmcblk0p2 ];
then

# mount and set perms
busybox mount -o noatime,nodiratime -t auto /dev/block/mmcblk0p2 /system/sd;
busybox chown 1000:1000 /system/sd;
busybox chmod 771 /system/sd;

# clean up any old symlinks, create data directories
for i in data;
do
if [ -h /data/$i ];
then
rm /data/$i;
fi;
if [ ! -d /data/$i ];
then
mkdir /data/$i;
busybox chown 1000:1000 /data/$i;
busybox chmod 771 /data/$i;
fi;
done;

# don't allow /data/data on sd because of upgrade issues - move it if possible
if [ -d /system/sd/data ];
then
busybox cp -a /system/sd/data/* /data/data/;
busybox rm -rf /system/sd/data;
fi;

# move apps from internal memory to sdcard
for i in app;
do
if [ ! -d /system/sd/$i ];
then
mkdir /system/sd/$i;
fi

busybox chown 1000:1000 /system/sd/$i;
busybox chmod 771 /system/sd/$i

if [ -d /data/$i ] && [ ! -h /data/$i ];
then
busybox cp -a /data/$i/* /system/sd/$i/;
busybox rm -f /data/$i/*;
fi;
done;

# symlink app dirs - they must be on the same filesystem
for i in app;
do
if [ -d /data/$i ] && [ ! -h /data/$i ];
then
busybox rm -rf /data/$i;
busybox ln -s /system/sd/$i /data/$i;
fi;
done;

# clean up old whiteouts
for i in local misc property system tombstones data;
do
if [ -h /system/sd/$i ]; then rm -f /system/sd/$i; fi
done;

# please don't put odex files in the app directory people!
# it causes dexopt to crash when switching builds!
busybox rm -f /system/sd/app/*.odex

setprop cm.a2sd.active 1;

echo "+++ Apps-to-SD successfully enabled";

else

# replace symlinks with directories so we can boot without sd
for i in app;
do
if [ -h /data/$i ];
then
rm -f /data/$i;
mkdir /data/$i;
busybox chown 1000:1000 /data/$i;
busybox chmod 771 /data/$i;
fi;
done;

setprop cm.a2sd.active 0;
fi;

sync;

8)Now, go into META-INF/com/google/android. Replace updater-script contents with this:

#Updater-script LeeDrOiD Mod
#For the HTC Desire
#Follow me on Twitter @LeeDrOiD

show_progress(0.500000, 0);

assert(getprop("ro.product.device") == "bravo" || getprop("ro.build.product") == "bravo" || getprop("ro.product.board") == "bravo");

ui_print("-Now Flashing LeeDrOiD 2.4");
ui_print("-Please be patient");
ui_print("-1st boot may take a few minutes");

show_progress(0.500000, 40);
ui_print("-Wiping system and cache.");
format("MTD", "cache");
format("MTD", "system");

ui_print("-Writing Data");
mount("MTD", "userdata", "/data");
package_extract_dir("data", "/data");

ui_print("-Writing SD-EXT");
run_program("/sbin/busybox", "mount", "/dev/block/mmcblk0p2", "/sd-ext");
package_extract_dir("sd-ext", "/sd-ext");
set_perm_recursive(0, 0, 0755, 0644, "/sd-ext/app_s");
set_perm_recursive(0, 0, 0755, 0644, "/sd-ext/framework_s");

mount("MTD", "system", "/system");
ui_print("-Writing System");
package_extract_dir("system", "/system");

show_progress(0.400000, 0);

ui_print("-Creating toolbox symlinks");
symlink("toolbox", "/system/bin/chownto", "/system/bin/getevent", "/system/bin/getprop", "/system/bin/ifconfig", "/system/bin/iftop", "/system/bin/ioctl", "/system/bin/log", "/system/bin/nandread", "/system/bin/newfs_msdos", "/system/bin/notify", "/system/bin/schedtop", "/system/bin/sendevent", "/system/bin/setprop", "/system/bin/smd", "/system/bin/start", "/system/bin/stop",	"/system/bin/vmstat", "/system/bin/watchprops", "/system/bin/wipe", "/system/bin/top");

ui_print("-Creating busybox symlinks");
symlink("/system/xbin/busybox", "/system/xbin/[", "/system/xbin/[[", "/system/xbin/addgroup", "/system/xbin/adduser", "/system/xbin/adjtimex", "/system/xbin/ar", "/system/xbin/arp", "/system/xbin/arping", "/system/xbin/ash", "/system/xbin/awk", "/system/xbin/basename", "/system/xbin/bbconfig", "/system/xbin/beep", "/system/xbin/blkid", "/system/xbin/brctl", "/system/xbin/bunzip2", "/system/xbin/bzcat", "/system/xbin/bzip2", "/system/xbin/cal", "/system/xbin/cat", "/system/xbin/catv", "/system/xbin/chat", "/system/xbin/chattr", "/system/xbin/chgrp", "/system/xbin/chmod", "/system/xbin/chown", "/system/xbin/chpasswd", "/system/xbin/chpst", "/system/xbin/chroot", "/system/xbin/chrt", "/system/xbin/chvt", "/system/xbin/cksum", "/system/xbin/clear", "/system/xbin/cmp", "/system/xbin/comm", "/system/xbin/cp", "/system/xbin/cpio", "/system/xbin/crond", "/system/xbin/crontab", "/system/xbin/cryptpw", "/system/xbin/cttyhack", "/system/xbin/cut", "/system/xbin/date", "/system/xbin/dc", "/system/xbin/dd", "/system/xbin/deallocvt", "/system/xbin/delgroup", "/system/xbin/deluser", "/system/xbin/depmod", "/system/xbin/devmem", "/system/xbin/df", "/system/xbin/diff", "/system/xbin/dirname", "/system/xbin/dmesg", "/system/xbin/dnsd", "/system/xbin/dnsdomainname", "/system/xbin/dos2unix", "/system/xbin/du", "/system/xbin/dumpkmap",	"/system/xbin/echo", "/system/xbin/ed", "/system/xbin/egrep", "/system/xbin/eject", "/system/xbin/env", "/system/xbin/envdir", "/system/xbin/envuidgid", "/system/xbin/ether-wake", "/system/xbin/expand", "/system/xbin/expr",	"/system/xbin/fakeidentd", "/system/xbin/false", "/system/xbin/fbset", "/system/xbin/fbsplash", "/system/xbin/fdflush", "/system/xbin/fdformat", "/system/xbin/fdisk", "/system/xbin/fgrep", "/system/xbin/find", "/system/xbin/findfs", "/system/xbin/fold", "/system/xbin/free", "/system/xbin/freeramdisk", "/system/xbin/fsck", "/system/xbin/fsck.minix", "/system/xbin/fsync", "/system/xbin/ftpd", "/system/xbin/ftpget", "/system/xbin/ftpput", "/system/xbin/fuser", "/system/xbin/getopt", "/system/xbin/getty", "/system/xbin/grep", "/system/xbin/gunzip", "/system/xbin/gzip", "/system/xbin/halt", "/system/xbin/hd", "/system/xbin/hdparm", "/system/xbin/head", "/system/xbin/hexdump", "/system/xbin/hostid", "/system/xbin/hostname", "/system/xbin/httpd", "/system/xbin/hush", "/system/xbin/hwclock", "/system/xbin/id", "/system/xbin/ifdown", "/system/xbin/ifenslave", "/system/xbin/ifplugd", "/system/xbin/ifup", "/system/xbin/inetd", "/system/xbin/init", "/system/xbin/insmod", "/system/xbin/install", "/system/xbin/ionice", "/system/xbin/ip", "/system/xbin/ipaddr", "/system/xbin/ipcalc", "/system/xbin/ipcrm", "/system/xbin/ipcs", "/system/xbin/iplink", "/system/xbin/iproute", "/system/xbin/iprule", "/system/xbin/iptunnel", "/system/xbin/kbd_mode", "/system/xbin/kill", "/system/xbin/killall", "/system/xbin/killall5", "/system/xbin/klogd", "/system/xbin/last", "/system/xbin/length", "/system/xbin/less", "/system/xbin/linux32", "/system/xbin/linux64", "/system/xbin/linuxrc", "/system/xbin/ln", "/system/xbin/loadfont", "/system/xbin/loadkmap", "/system/xbin/logger", "/system/xbin/login", "/system/xbin/logname", "/system/xbin/logread", "/system/xbin/losetup", "/system/xbin/lpd", "/system/xbin/lpq", "/system/xbin/lpr", "/system/xbin/ls", "/system/xbin/lsattr", "/system/xbin/lsmod", "/system/xbin/lzmacat", "/system/xbin/lzop", "/system/xbin/lzopcat", "/system/xbin/makedevs", "/system/xbin/makemime", "/system/xbin/man", "/system/xbin/md5sum", "/system/xbin/mdev", "/system/xbin/mesg", "/system/xbin/microcom", "/system/xbin/mkdir", "/system/xbin/mkdosfs", "/system/xbin/mkfifo", "/system/xbin/mkfs.minix", "/system/xbin/mkfs.vfat", "/system/xbin/mknod", "/system/xbin/mkpasswd", "/system/xbin/mkswap", "/system/xbin/mktemp", "/system/xbin/modprobe", "/system/xbin/more", "/system/xbin/mount", "/system/xbin/mountpoint", "/system/xbin/msh", "/system/xbin/mt", "/system/xbin/mv", "/system/xbin/nameif", "/system/xbin/nc", "/system/xbin/netstat", "/system/xbin/nice", "/system/xbin/nmeter", "/system/xbin/nohup", "/system/xbin/nslookup", "/system/xbin/od", "/system/xbin/openvt", "/system/xbin/passwd", "/system/xbin/patch", "/system/xbin/pgrep", "/system/xbin/pidof", "/system/xbin/ping", "/system/xbin/ping6", "/system/xbin/pipe_progress", "/system/xbin/pivot_root", "/system/xbin/pkill", "/system/xbin/popmaildir", "/system/xbin/poweroff", "/system/xbin/printenv", "/system/xbin/printf", "/system/xbin/ps", "/system/xbin/pscan", "/system/xbin/pwd", "/system/xbin/raidautorun", "/system/xbin/rdate", "/system/xbin/rdev", "/system/xbin/readahead", "/system/xbin/readlink", "/system/xbin/readprofile", "/system/xbin/realpath", "/system/xbin/reformime", "/system/xbin/renice", "/system/xbin/reset", "/system/xbin/resize", "/system/xbin/rm", "/system/xbin/rmdir", "/system/xbin/rmmod", "/system/xbin/route", "/system/xbin/rtcwake", "/system/xbin/run-parts", "/system/xbin/runlevel", "/system/xbin/runsv", "/system/xbin/runsvdir", "/system/xbin/rx", "/system/xbin/script", "/system/xbin/scriptreplay", "/system/xbin/sed", "/system/xbin/sendmail", "/system/xbin/seq", "/system/xbin/setarch", "/system/xbin/setconsole", "/system/xbin/setfont", "/system/xbin/setkeycodes", "/system/xbin/setlogcons", "/system/xbin/setsid", "/system/xbin/setuidgid", "/system/xbin/sha1sum", "/system/xbin/sha256sum", "/system/xbin/sha512sum", "/system/xbin/showkey", "/system/xbin/slattach", "/system/xbin/sleep", "/system/xbin/softlimit", "/system/xbin/sort", "/system/xbin/split", "/system/xbin/start-stop-daemon", "/system/xbin/stat", "/system/xbin/strings", "/system/xbin/stty", "/system/xbin/sulogin", "/system/xbin/sum", "/system/xbin/sv", "/system/xbin/svlogd", "/system/xbin/swapoff", "/system/xbin/swapon", "/system/xbin/switch_root", "/system/xbin/sync", "/system/xbin/sysctl", "/system/xbin/syslogd", "/system/xbin/tac", "/system/xbin/tail", "/system/xbin/tar",	"/system/xbin/tcpsvd", "/system/xbin/tee", "/system/xbin/telnet", "/system/xbin/telnetd", "/system/xbin/test", "/system/xbin/tftp", "/system/xbin/tftpd", "/system/xbin/time", "/system/xbin/timeout", "/system/xbin/touch", "/system/xbin/tr", "/system/xbin/traceroute", "/system/xbin/true", "/system/xbin/tty",	"/system/xbin/ttysize", "/system/xbin/tunctl", "/system/xbin/udpsvd", "/system/xbin/umount", "/system/xbin/uname", "/system/xbin/uncompress", "/system/xbin/unexpand", "/system/xbin/uniq", "/system/xbin/unix2dos", "/system/xbin/unlzma", "/system/xbin/unlzop", "/system/xbin/unzip", "/system/xbin/uptime", "/system/xbin/usleep", "/system/xbin/uudecode", "/system/xbin/uuencode", "/system/xbin/vconfig", "/system/xbin/vi", "/system/xbin/vlock", "/system/xbin/volname", "/system/xbin/watch", "/system/xbin/watchdog", "/system/xbin/wc", "/system/xbin/wget", "/system/xbin/which", "/system/xbin/who", "/system/xbin/whoami", "/system/xbin/xargs", "/system/xbin/yes", "/system/xbin/zcat", "/system/xbin/zcip");

ui_print("-Setting additional symlinks");
symlink("/system/xbin/busybox", "/system/bin/busybox");
symlink("/system/xbin", "/system/xbin/bb");
symlink("/system/xbin/su", "/system/bin/su");
symlink("/data/data/hosts", "/system/etc/hosts");
symlink("/system/sd/app_s","/system/app");
symlink("/system/sd/framework_s","/system/framework");

ui_print("-Setting permissions");
set_perm_recursive(0, 0, 0755, 0644, "/system");
set_perm_recursive(0, 2000, 0755, 0755, "/system/bin");
set_perm(0, 3003, 02750, "/system/bin/netcfg");
set_perm(0, 2000, 0775, "/system/bin/iptables");
set_perm_recursive(1002, 1002, 0775, 0440, "/system/etc/bluez");
set_perm(0, 0, 0775, "/system/etc/bluez");
set_perm(1000, 1000, 0755, "/system/bin/bash");
set_perm(1000, 1000, 0755, "/system/bin/nano");
set_perm(1000, 1000, 0755, "/system/bin/sysro");
set_perm(1000, 1000, 0755, "/system/bin/sysrw");
set_perm(1000, 1000, 0755, "/system/bin/openvpn");
set_perm(1000, 1000, 0755, "/system/bin/iproute-script.sh");
set_perm(1000, 1000, 0755, "/system/bin/vpnc");
set_perm(1000, 1000, 0755, "/system/bin/vpnc-script.sh");
set_perm(0, 3004, 02755, "/system/bin/ping");
set_perm(1002, 1002, 0440, "/system/etc/dbus.conf");
set_perm(1014, 2000, 0550, "/system/etc/dhcpcd/dhcpcd-run-hooks");
set_perm(0, 2000, 0550, "/system/etc/init.goldfish.sh");
set_perm_recursive(0, 0, 0755, 0555, "/system/etc/ppp");
set_perm(0, 0, 04755, "/system/etc/ppp/ip-up-vpn");
set_perm_recursive(0, 2000, 0755, 0755, "/system/xbin");
set_perm_recursive(0, 2000, 0755, 0755, "/system/etc/init.d");
set_perm(0, 0, 06755, "/system/xbin/su");
set_perm(0, 0, 04755, "/system/xbin/busybox");
set_perm(0, 0, 04755, "/system/bin/sh");
set_perm(1000, 1000, 0771, "/data");
set_perm_recursive(1000, 1000, 0771, 0644, "/data/app");
set_perm(0, 0, 0644, "/system/bin/profile");
set_perm_recursive(0, 0, 0700, 0600, "/data/property");

show_progress(0.200000, 10);

ui_print("-Writing boot.img");
assert(package_extract_file("boot.img", "/tmp/boot.img"),
write_raw_image("/tmp/boot.img", "boot"),
delete("/tmp/boot.img"));

ui_print("-Cleaning up");
format("MTD", "cache");
mount("MTD", "sdext", "/sdext");
delete_recursive("/data/dalvik-cache");
delete_recursive("/sdext/dalvik-cache");

show_progress(0.100000, 0);
ui_print("-Flashing Complete");
ui_print("Welcome to");
ui_print(" ");
ui_print("L EEEE EEEE DDD RRR OO IIIII DDD");
ui_print("L E E D D R R O O I D D");
ui_print("L EEE EEE D D R R O O I D D");
ui_print("L E E D D R R O O I D D");
ui_print("LLLL EEEE EEEE DDD R R OO IIIII DDD");
ui_print(" ");
ui_print(" 222 44 ");
ui_print(" 2 2 4 4 ");
ui_print(" 2 4 4 ");
ui_print(" 2.4 2.4 2 444444 2.4 2.4 ");
ui_print(" 2 .. 4 ");
ui_print(" 22222 .. 444 ");
ui_print(" ");
ui_print("-Please ensure you");
ui_print("-complete at least 1 full boot");
ui_print("-prior to flashing any themes");
unmount("/sdext");
unmount("/data");
unmount("/system");

9) Zip all files and folders again

10) Flash it.

11 (optional)) If you want market fix, after first boot, edit init.rc (ADB push/pull)

Replace all contents with this

Hope this helps, and sorry for my bad english ;)