[Xperia Arc Android Development] Retrosid:
How comes I end up with this error:

Starting recovery on Sat Apr 27 11:00:07 2013
framebuffer: fd 4 (480 x 854)
CWM-based Recovery v6.0.3.1 [mechmetal]
recovery filesystem table
=========================
0 /tmp ramdisk (null) (null) 0
1 /cache yaffs2 cache (null) 0
2 /data yaffs2 userdata (null) 0
3 /system yaffs2 system (null) 0
4 /sdcard vfat /dev/block/mmcblk0p1 (null) 0
5 /sd-ext auto /dev/block/mmcblk0p2 (null) 0

W:Unable to get recovery.fstab info for /datadata during fstab generation!
W:Unable to get recovery.fstab info for /emmc during fstab generation!
W:Unable to get recovery.fstab info for /external_sd during fstab generation!
I:Completed outputting fstab.
I:Processing arguments.
I:Checking arguments.
Warning: No file_contexts
I:device_recovery_start()
Command: "/sbin/recovery"

ro.boot.hardware=semc
ro.serialno=
ro.bootmode=unknown
ro.baseband=unknown
ro.bootloader=unknown
ro.hardware=semc
ro.revision=0
ro.emmc=0
ro.boot.emmc=0
ro.factorytest=0
ro.secure=1
ro.allow.mock.location=0
ro.debuggable=1
persist.sys.usb.config=mtp
ro.build.id=JZO54K
ro.build.display.id=cm_anzu-userdebug 4.1.2 JZO54K eng.root.20130405.234612 test-keys
ro.build.version.incremental=eng.root.20130405.234612
ro.build.version.sdk=16
ro.build.version.codename=REL
ro.build.version.release=4.1.2
ro.build.date=Fri Apr 5 23:46:40 EEST 2013
ro.build.date.utc=0
ro.build.type=userdebug
ro.build.user=root
ro.build.host=ubuntu
ro.build.tags=test-keys
ro.product.model=Xperia Arc S
ro.product.brand=SEMC
ro.product.name=LT18i
ro.product.device=anzu
ro.product.board=mogami
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=SEMC
ro.wifi.channels=
ro.board.platform=msm7x30
ro.build.product=anzu
ro.build.description=LT18i-user 4.0.4 4.1.B.0.431 UL5_3w test-keys
ro.build.fingerprint=SEMC/LT18i_1254-2184/LT18i:4.0.4/4.1.B.0.431/UL5_3w:user/release-keys
ro.build.characteristics=default
ro.cm.device=anzu
keyguard.no_require_sim=true
ro.com.android.dateformat=MM-dd-yyyy
ro.carrier=unknown
dalvik.vm.heapstartsize=5m
dalvik.vm.heapgrowthlimit=48m
dalvik.vm.heapsize=128m
ro.opengles.version=131072
rild.libpath=/system/lib/libril-qc-1.so
rild.libargs=-d/dev/smd0
ro.ril.hsxpa=1
ro.ril.gprsclass=10
ro.ril.def.agps.mode=2
ro.ril.def.agps.feature=1
ro.telephony.call_ring.multiple=false
wifi.supplicant_scan_interval=15
ro.com.google.locationfeatures=1
ro.product.locale.language=en
ro.product.locale.region=US
persist.ro.ril.sms_sync_sending=1
ro.use_data_netmgrd=true
ro.tethering.kb_disconnect=1
com.qc.hardware=true
debug.sf.hw=1
debug.composition.type=gpu
hwui.render_dirty_regions=false
hwui.disable_vsync=true
debug.mdpcomp.logs=0
BUILD_UTC_DATE=0
sys.mem.max_hidden_apps=10
debug.camcorder.disablemeta=1
wifi.interface=wlan0
wifi.softap.interface=wlan0
wifi.softapconcurrent.interface=wlan0
ro.telephony.ril_class=SemcRIL
ro.telephony.default_network=0
ro.sf.lcd_density=240
com.qc.hdmi_out=false
ro.rommanager.developerid=cyanogenmod
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.clientidbase=android-google
ro.com.android.wifi-watchlist=GoogleGuest
ro.setupwizard.enterprise_mode=1
ro.com.android.dataroaming=false
ro.cm.version=10-20130405-UNOFFICIAL-anzu
ro.modversion=10-20130405-UNOFFICIAL-anzu
ro.config.ringtone=Orion.ogg
ro.config.notification_sound=Deneb.ogg
ro.config.alarm_alert=Hassium.ogg
dalvik.vm.lockprof.threshold=500
dalvik.vm.dexopt-flags=m=y
net.bt.name=Android
net.change=net.bt.name
dalvik.vm.stack-trace-file=/data/anr/traces.txt
init.svc.ueventd=running
init.svc.recovery=running
service.adb.root=1
init.svc.adbd=running

I:Checking for extendedcommand...
I:Skipping execution of extendedcommand, file not found...

-- Installing: /sdcard/updates/urushi_PAC_JB_4.2.2-v22.1.0_20130415-195817.zip
Finding update package...
I:Update location: /sdcard/updates/urushi_PAC_JB_4.2.2-v22.1.0_20130415-195817.zip
Opening update package...
Installing update...
Warning: No file_contexts
script aborted: assert failed: getprop("ro.product.device") == "ST18i" || getprop("ro.build.product") == "ST18i" ||
getprop("ro.product.device") == "ST18a" || getprop("ro.build.product") == "ST18a" ||
getprop("ro.product.device") == "urushi" || getprop("ro.build.product") == "urushi"
assert failed: getprop("ro.product.device") == "ST18i" || getprop("ro.build.product") == "ST18i" || getprop("ro.product.device") == "ST18a" || getprop("ro.build.product") == "ST18a" || getprop("ro.product.device") == "urushi" || getprop("ro.build.product") == "urushi"
E:Error in /sdcard/updates/urushi_PAC_JB_4.2.2-v22.1.0_20130415-195817.zip
(Status 7)
Installation aborted.

This happened after I did factory reset, wipe cache, wipe system, wipe dalvik and tried to install the rom.

My device is Xperia Arc (Lt15i), the rest of the information are included on the error log. I've re-downloaded the zip incase of faulty download, and again the same error.