ok 1st things first do u wanna delete em 4ever(u always have a backup on the cf card that came with the MPC)?? U can go into mode load and turn off the autoload from internal memory, and you can always turn it back on) or just delete the unwanted sq's,pgm's,and samples---I built a few kits outta the factory joints and tweaked em and i kept a couple of the factory programs and tweaked em too.) To delete Sq's and PGM's highlight the SQ or PGM on the main screen and hit WINDOW then the Fkey6 for delete ,you can then delete that 1 or all of them... to delete samples go mode trim, hit window and then delete you also can dlete them all, or just purge the memory.....anyway Read the Manual--like ised not 2 be a D@#K-the manual is ur BIBLE---If u dont have a manual go to akaipro.com/archives and download the manual(PDF file-need adobe acrobat to open it) and print that beeetch out(if u got the ink and paper) or save it to ur PC's hard drive and read it when needed. Peace and hot fishgrease..................May da Force be witchu.............