How do I stop OS X from mounting a certain partition on startup?

[NamV]

I currently have iDeneb 1.4 installed on my computer, but it's very unstable. I get random kernel panic after about 30 mins to 2 hours of use (it actually crashes even if I leave the computer idle).

I suspect it may have something to do with the way it handles the hard drives, as I've seen symptoms that it affects other OS'es on the system as well. I have Windows 7 installed on another separate hard drive, and each time I log into Windows after my OS X crashed, it prompts me for a disk consistency check, plus the Windows date & time was all screwed up, also the audio would go "chipmunk".

So basically, is there away to prevent Mac from mounting all the partitions on the system when it starts up?