If you need any more help figuring stuff out, check this article out.... I wrote it using Finale 2002, so it should be fine with your 2003. It'll help you with setting up your percussion maps and where to find the sounds you want in General Midi. Might also help you get the tenor drums' part fixed up and get the gock in the right place.
YoungComposers.com/articles/Writing Percussion Staves in Finale
And shouldn't you have five bass drum parts as opposes to four?
And the slashy thingy y'all are talking about is an articulation, it should be #32. It will playback when you apply Smart Playback or Human Playback.