First all patchs on the XP-10 are ROM(read only memory)-there is no editing of the patchs themselves, just the effects. So after you power down the unit you loose all your changes. This is the major shortcoming of the XP-10 and that's why there aren't too many still in use today. Your best bet is to get a cheap second hand module like the JV-1010, Alesis Nanosynth, or any modules from Yamaha, Korg, or E-mu(Musician's friend has the Proteus 1K for $299 on special) that has RAM(Random Access Memory) which let you store edited patches, and you would have access to tons of free material via the internet, and it would be a nice addition to your Xp-10. The nano should be available for under $200US, and the JV1010 should be under $325US. If you can't afford that, and you use a PC, have a soundblaster card, you can always get free soundfonts via the internet, and incorporate them with your sequences from your XP-10. For $29US you can get a full blown audio/midi sequencer from PG Music, and if anyone can't afford $29US they should really thing about doing something else with there time because it does take $$ to obtain the equipment that makes you sound good-regardless what anyone else tells you.