App. to mount the system dir with r/w permission (especially for new(-er) Froyo versions)
Mount the dir at demand, or tell the app to mount it every time the Android shell is loaded. update: added an option to remount the dir as r/o
On the Android market (free)
Scan:
or search for mount system
The program is called mount /system (rw / ro)
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(Repost because during a maintenance this night xda-dev has restored a backup from 24 hours ago.)