You're lucky, at work we have a bunch of machines that need win98 to run the control software! All the CPU's have been dying on us lately, hard to find the old stuff. I'm kicking myself thinking of all the 386/486/early pentimum stuff I've thrown out over the years.
When we order some new regular work PC's we were able to 'downgrade' to XP, they came preinstalled with vista but came with a XP install disk, I don't think they charged anything for it.
2011 Sprint GT, 2000 Moto Guzzi Jackal, 1981 Honda CB750F, 1957 BSA Bantam D3 restoration project, Past bikes -2008 Kawasaki KLR650, 1986 Honda Shadow VT1100C, 1998 Honda Shadow Aero VT1100C3, 2006 Yamaha FZ6, 2006 Kawasaki ZX-14,1980 Yamaha XT500