Yamaha DTXpress/DTXplorer/DTXtreme

Hello again, 
Sorry to ask again, but I did not get any takers on the following 
questions last week. So can anyone help this week ?

1) Is there a system exclusive (sysex) librarian/filer software
package available for the DTXPressIII, that would allow a Windows PC
to be used to change settings and store/load bulk dump data?

2) Is there a way, in the DTXPressIII, to find out how much memory
has been used/remains for Song recording?

3) Is there a way, in the DTXPressIII, to disable the 2 measure lead-
in when recording is started, during which no recording occurs?

4) Is there a way, in the DTXPressIII, to edit Song data?
Specifically, I would like to be able to adjust the volume of the
drum channel and the melody channels individually.

5) If "melody" and "drum" data have been recorded via MIDI into a
Song on seperate MIDI channels, is there a way, in the DTXPressIII,
to temporarily disable the melody channels so that only the drum
channel (10) can be heard and the melody channels are muted?

Al