I just installed Windows 2000/Kubuntu today.
Windows:Idiotic thing wouldn't recgonzie the rest of the partitions, and forced me to install it on the first primary one. (I have a primary, then a bunch of logical). Fortunately, this made sense given my setup.
Once I got past the hassle caused by Microsoft half-assing the section of the installer that handles adding drivers for things like my SATA drive, and the above error, install went pretty smoothly.
To be fair, though, I should mention that I was only able to get to this point because I slipstreamed service pack 4 onto a Windows 2000 install CD. Without it, the installer screen for custom driver disks crashes no matter what. Way to go, Microsoft.
Kubuntu64 Linux:Install seemed to go fine. Then I discovered that the system would only half-install. After running fsck, and wrecking the partition to the point that it was no longer bootable, I decided to try a new filesystem and reinstall. But GRUB didn't support that one, so I tried JFS. That seemed to work, but then I started getting the same error as before.
So I played on a hunch and quit out of the virtually-useless aptitutde. It has a nice little user-friendly error that tells you exactly what happened in easily understandable terms, and then apparently expects you to know and install each one of the packages individually yourself.

I then removed my CD from the apt sources list, removed the corrupt .deb file in the apt cache, and forced it to download the package in question from the server. After that everything worked well; my soundcard even works out of the box, once I'd unmuted it. The GUI mixer is actually useful, too.
Kaffeine still crashes, and I have yet to get DVD players working.
READ THIS PART - RARE COMPLIMENT FOR LINUXOnce I'd gotten the core system working, all I had to do to get Firefox and Thunderbird working was right-click them in 'kynaptic' and then click 'install'. Then commit the changes.
But because I'd used my old home partition as well, both programs were setup exactly as I'd had them before - no hassle, no fuss, no need to export anything from some registry.