try adding line 5 in you .bak so you can have read/write permissions
3. cd C:\AndroidSDK\tools (or were ever you SDK files are)
4. adb remount
The filesystem is mounted read only. You need to mount it read/write.
5. adb shell mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system
3. cd C:\AndroidSDK\tools (or were ever you SDK files are)
4. adb remount
The filesystem is mounted read only. You need to mount it read/write.
5. adb shell mount -o remount,rw -t yaffs2 /dev/block/mtdblock4 /system