Parallels 6: Drive order problem with Mac Pro fixed?

I have Parallels 5 on a 2008 Mac Pro with multiple hard drives (4). Windows 7 is installed on its own drive. In the past, when I have restarted my Mac, it sometimes orders the drives differently, which causes Parallels to declare that Parallels Tools are not installed and spend a lot of time reconfiguring the drive (or whatever, it is slower and engages in some kind of mysterious activity). I was told that this problem was an Apple one; there was no way to lock the order of drives (and thus prevent Parallels from having a problem). I'm not a computer expert so forgive me if I'm not explaining this perfectly.

Anyway, I'm just wondering if Parallels 6 "fixes" this problem or not. I really don't want to upgrade if I'm still going to have this headache.

Thanks.