Help with new Sampler!!

I just bought an Akai S-900 off of Ebay and I am trying to figure out how to lay different samples and drum hits across the keyboard. The manual isn't much help. Does anybody have any experience with this sampler? Thanks in advance?

uh the manual is the only way to learn it chief. rack samplers use key gorups and programs then a multi program to control like 8 of em
READ MANUAL

I finally figured it out. I forgot that these old samplers are a b**** sometimes.