Hey Robert,
By the newer Windows OS I'm guessing you mean Vista?
I don't know how widely its supported by camera
manufacturers, but I do have a temporary fix. You can set up your PC to 'dual
boot' both Vista and your old copy of XP, which lets you choose the OS you want
to run when you switch on.
This way you can keep your old software working with your
Vista machine without having to pay for an upgrade.
A lot of my friends use this technique to let them play old
games on new computers, so its quite well documented on the net. Stick "dual
booting xp and vista" into Google and you should get a number of step-by-step guides.
Hope this helps.