You're very welcome. I used to run this PC as a dual-boot setup, and originally the Windows XP install would crash during bootup, maybe 1/3 of the time. It turned out that I'd accidentally set the jumper on the drive to "slave" rather than "master." Once I fixed it, it ran solidly ever after (until the drive itself physically quit, and I haven't reinstalled Windows since).
I don't know about newer releases (Vista/7), but Windows 95/98/XP never even gave the option to install on a partition other than the first one on the first drive. I always figured the folks at Microsoft assumed their users were going to run Windows exclusively.
Yep, you can choose other partitions/configurations (even in XP) but the wizard isn’t intuitive. I thought the same of the Ubuntu setup wizard the first time - now it’s second nature.