Default how the heck?? App2SD on G2

hey all - how the hell do you get this program running????

I've rooted my phone (easy), got the files from http://forum.xda-developers.com/showthread.php?t=512743 and tried to follow but come up with immediate problems:

eg. su
cp /sdcard/init.rc /data/
cp /sdcard/a2sd.sh /data/

each line comes up with : cp:not found. eh?????? whn i run the program it just says the cards not been formatted right (which it has and partitioned with ext2 1gb in size as per http://forum.xda-developers.com/showthread.php?t=512873).

Any clues?