Honestly, replacing ram is one of the easier ways to upgrade a computer, drum machine, or other device. Typically, there are slots where the RAM can only go in one way. Some RAM chips you slide in and have plastic tabs on the side that snap into the RAM edge. Other RAM you angle in, and then snap it in. This video shows you how to add RAM to an Akai MPC 4000 drum machine. It is pretty easy, and RAM specifically for it can be found online.