I'm not surprised you're having SCSI issues if you're using the Ubuntu Notebook Remix installer. In fact, I sort of have a vague memory in general about Ubuntu needing you to use the "Alternate/Server" installation images if you're using SCSI? (Hrm, googled it and found a number of threads that basically imply that the SCSI drivers are there on normal Ubuntu CDs but the installer is sort of borked and *sometimes* adding some kernel switches fixes it. This seems to be a problem unique to Ubuntu, Debian and other distributions don't have it.)
Not to lecture or anything, but of course if you actually want Linux on there for reals (instead of just to test the hardware) I'd definitely recommend using a newer version of Ubuntu than 9.10. 9.10 is *old*, wasn't an LTS release, and therefore isn't being updated anymore. (Heck, I ran into an annoying "surprise" recently on a machine with a 10.10 install on it after pulling it out of a box; all the repositories I've tried have pulled their update directories for versions that old so it's not even straightforwardly possible to step it up to a current release by upgrading through the intermediate versions. There a manual procedure I could *try* to force it up to 12.04 but it's likely enough to end in failure that the better bet is to just reinstall it from a disk.) Xubuntu 12.04 LTS would probably work okay on a 1Ghz Pentium III.
Of course, if the ultimate goal is Windows you'll probably want to wait until *after* you've installed Windows to install your "permanent" Linux as a dual-boot. It's technically *possible* to set up Linux first but it's agony.
Not to lecture or anything, but of course if you actually want Linux on there for reals (instead of just to test the hardware) I'd definitely recommend using a newer version of Ubuntu than 9.10. 9.10 is *old*, wasn't an LTS release, and therefore isn't being updated anymore. (Heck, I ran into an annoying "surprise" recently on a machine with a 10.10 install on it after pulling it out of a box; all the repositories I've tried have pulled their update directories for versions that old so it's not even straightforwardly possible to step it up to a current release by upgrading through the intermediate versions. There a manual procedure I could *try* to force it up to 12.04 but it's likely enough to end in failure that the better bet is to just reinstall it from a disk.) Xubuntu 12.04 LTS would probably work okay on a 1Ghz Pentium III.
Of course, if the ultimate goal is Windows you'll probably want to wait until *after* you've installed Windows to install your "permanent" Linux as a dual-boot. It's technically *possible* to set up Linux first but it's agony.