Yamaha DTXpress/DTXplorer/DTXtreme

Hello there,
I amnot a drumme, but we have bought a DTXpress III Sp for our studio 
and not mutch of experience with it, hopefully I will get a hand from 
you guys in order to do a recording session with Cubase sx (in 3 days 
time)so:

1- Drumer Tried to trigger Ghost notes and the least vel I got it was 
18 and not all the hits were recorded, How do you achieve ghost notes.

2- using brushes ...which is better tell the guy to bring his snare 
and record it accosticly... or is there a way to work with it on DTX.

3- trying to achieve swiiishhhhhh effect by continuously hiting a 
cybal will retriger the note and instead I will have a machine Gun 
effect... is there any way to do it or should I tell the drummer to 
bring his cybal and Mic it.

4- Is it possible to record Cymbal Chokes via MIDI and if not any 
ideas or woekarroung.

5- do you have a drum map for cubase sx ...note I have placed one in 
the forum's files section but it is based on the excel file already 
there and it didn't match?

Thanks a million
WoofWoofX