Heh... no. VMware allows you to install other operating systems (except for Apple) on your computer, with out having to dual boot or anything else.
You log into XP Pro (for me), start VMware and then you can actually boot into Linux, Windows, Novell... just about whatever you install. Then you can switch between XP and Linux with out ever shutting down. You can have virtual networks too.
Very good stuff for testing other OSes and seeing whether or not a certian program will work with whatever OS.
It's really amazing stuff.
I've stuck with using Virtual PC for quite some time, but I suppose I could give this a shot. Already had RedHat 8 running successfully, sorry though, as I have never experimented with Slackware through the software.
Apart from specifying the correct kernel parameter to get Slackware to recognize the virtual SCSI disk, I didn't do anything special to install it. How much memory do you have in your computer and how much did you give to VMware?