[Nexus One Android Development] MicroMod777:
Here's an exp. I found from RCMixHD.v1:

show_progress 0.1 0
format CACHE:
format SYSTEM:
delete SYSTEM:xbin/busybox
delete_recursive SYSTEM:xbin
run_program PACKAGE:check_data_app
copy_dir PACKAGE:data SDEXT:
set_perm_recursive 1000 1000 0771 0644 SDEXT:app
set_perm_recursive 1000 1000 0771 0644 SDEXT:framework
set_perm_recursive 1000 1000 0771 0644 SDEXT:customize
set_perm_recursive 1000 1000 0771 0644 SDEXT:tts
set_perm_recursive 1000 1000 0771 0644 SDEXT:fonts
copy_dir PACKAGE:system SYSTEM:
#symlink /sd-ext/sd SYSTEM:sd
symlink /system/sd/framework SYSTEM:framework
symlink /system/sd/customize SYSTEM:customize
symlink /system/sd/tts SYSTEM:tts
symlink /system/sd/fonts SYSTEM:fonts
symlink toolbox SYSTEM:bin/date
symlink toolbox SYSTEM:bin/vmstat
symlink toolbox SYSTEM:bin/smd
symlink toolbox SYSTEM:bin/watchprops
symlink toolbox SYSTEM:bin/df
symlink toolbox SYSTEM:bin/ps
symlink toolbox SYSTEM:bin/rmmod
symlink toolbox SYSTEM:bin/newfs_msdos
symlink toolbox SYSTEM:bin/stop
symlink toolbox SYSTEM:bin/mount
symlink toolbox SYSTEM:bin/wipe
symlink toolbox SYSTEM:bin/ls
symlink toolbox SYSTEM:bin/lsmod
symlink toolbox SYSTEM:bin/chown
symlink toolbox SYSTEM:bin/mv
symlink toolbox SYSTEM:bin/dd
symlink toolbox SYSTEM:bin/ln
symlink toolbox SYSTEM:bin/ifconfig
symlink toolbox SYSTEM:bin/rm
symlink toolbox SYSTEM:bin/start
symlink toolbox SYSTEM:bin/chmod
symlink toolbox SYSTEM:bin/insmod
symlink toolbox SYSTEM:bin/kill
symlink toolbox SYSTEM:bin/dmesg
symlink toolbox SYSTEM:bin/getprop
symlink toolbox SYSTEM:bin/schedtop
symlink toolbox SYSTEM:bin/umount
symlink toolbox SYSTEM:bin/sync
symlink toolbox SYSTEM:bin/renice
symlink toolbox SYSTEM:bin/rmdir
symlink toolbox SYSTEM:bin/log
symlink toolbox SYSTEM:bin/top
symlink toolbox SYSTEM:bin/cmp
symlink toolbox SYSTEM:bin/getevent
symlink toolbox SYSTEM:bin/ioctl
symlink toolbox SYSTEM:bin/nandread
symlink toolbox SYSTEM:bin/sendevent
symlink toolbox SYSTEM:bin/hd
symlink toolbox SYSTEM:bin/netstat
symlink toolbox SYSTEM:bin/setconsole
symlink toolbox SYSTEM:bin/id
symlink toolbox SYSTEM:bin/notify
symlink toolbox SYSTEM:bin/iftop
symlink toolbox SYSTEM:bin/route
symlink toolbox SYSTEM:bin/mkdir
symlink toolbox SYSTEM:bin/sleep
symlink toolbox SYSTEM:bin/printenv
symlink toolbox SYSTEM:bin/setprop
symlink toolbox SYSTEM:bin/cat
set_perm_recursive 0 0 0755 0644 SYSTEM:
set_perm_recursive 0 2000 0755 0755 SYSTEM:bin
set_perm_recursive 0 2000 0755 0755 SYSTEM:xbin
set_perm_recursive 0 2000 0755 0755 SYSTEM:etc/init.d
set_perm 0 3003 02755 SYSTEM:bin/netcfg
set_perm 0 3004 02755 SYSTEM:bin/ping
#set_perm 0 2000 06755 SYSTEM:bin/reboot
set_perm_recursive 0 2000 0755 0755 SYSTEM:etc/ppp
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 0 0 04755 SYSTEM:bin/bash
#symlink /system/bin/bash SYSTEM:bin/sh
set_perm 0 0 04755 SYSTEM:bin/sysrw
set_perm 0 0 04755 SYSTEM:bin/sysro
set_perm 0 0 04755 SYSTEM:bin/nano
set_perm_recursive 0 0 0755 0555 SYSTEM:etc/ppp
set_perm_recursive 0 2000 0755 06755 SYSTEM:xbin
set_perm 0 0 04755 SYSTEM:etc/ppp/ip-up-vpn
set_perm 0 0 04755 SYSTEM:bin/su
set_perm 0 0 04755 SYSTEM:xbin/busybox
set_perm 0 0 04755 SYSTEM:bin/toolbox
#set_perm 0 0 04755 SYSTEM:customize
#set_perm 0 0 04755 SYSTEM:framework
#set_perm 0 0 04755 SYSTEM:tts
#symlink /system/xbin SYSTEM:xbin/bb
set_perm_recursive 0 2000 0755 0755 SYSTEM:etc/init.d
show_progress 0.1 10
show_progress 0.2 0
run_program PACKAGE:installbusybox
write_raw_image PACKAGE:boot.img BOOT:
show_progress 0.2 10