There are basicly 2 ways of editing midi (whichi s what you want): through score, or through the key editor. The latter is by far the easiest and most powerfull.
1) right click somewhere in the blue area directly left of the timeline, and select "Add Midi track".
2) Now double click somewhere on the track in the timeline. You will be taken to the key editor. This is where you can draw in notes in a piano-roll. The color of the notes indicates their loudness (velocity), blue beeing the lowest velocity, red beeing the highest. You can change this above where it says "insert velocity".
3) Close the midi editor. Open de VST Rack (Windows -> vst instruments). You will have to use sampler (which is not supplied by Cubase) to load your wavefiles. Can't help you further with that. If you don't have a sampler, you cannot use your samples with Midi, unless you make you own scripts for the LM9, which is a big hastle and totally not worth it.
4) Another options is importing the samples into audio tracks, and moving them around as you see fit. This gives alot of control over every sample (you have pitcht/time/volume/eq/compression etc. control over every sample if you want, but it's very time consuming and not very handy).
My suggestion: goto
www.kvraudio.com and do a search for free drum samplers. You will find many. It takes time to learn how to program drums well. Good luck!
