I know you only get a Mono track when you generate a UT Instrument/Drums at the moment.
Now, when I drag this in to RB it ask me if I want to split it to 8 Mono tracks.
I would like to be able to use this as a UT Drum track so as I generate it, it will do the same , ask if I want to split to 8 Mono tracks.
Multitrack 8ch Drums 138.wav 38meg unzipped.

It might be asking too much to be able to use WavPack Lossless Audio Compression ?
Multitrack 8ch Drums 138.wavpak 15meg unzipped.

Use WinRar to unzip, it's free.