factory image and root상태에서 system app올리기

Here are the console commands for installing/removing system apps in android console emulator, very easy ; )

You must have ROOT and console emulator, I found this very helpful, so I hope it helps others as well...
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Install App to System:

Place APK file in the root folder on your sd card.

Open terminal and enter these commands:

# su
# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system
# cat /sdcard/filename.apk > /system/app/filename.apk

# chmod 777 /system/app/filename.apk (READ 권한이 없으면 등록이 안됨)

# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system
# reboot
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Remove App from System (Be careful what you remove):

# mount -o remount,rw /system
# rm /system/app/Filename.apk

[Optional, to make read-only again]
# mount -o remount,r /system

[When Finished]
# reboot

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****KEY****
"#" means root command will follow
[Notes are in these brackets and aren't commands]

- ENJOY

ALSO...