Big thanks due to Mark here. He went to the trouble of running me off a Win98 boot disk and mailing it to me. You're a gentleman. Still wasn't straightforward though as the CD drivers on the new boot disk kept hanging the machine, so I had to boot with the boot disk that came with the Windows CD, then use the new one to format the disk (as the Microsoft disk didn't have FORMAT on it!!!!!) and only then could I move the requisite files onto the PC card virtual hard drive and start the installation proper. So Mark, you're a total lifesaver here bruv and I owe you a drink!

So I finally have Windows 98 installed on my compatibility card! I gotta say, I was way more excited about this than I should have been. It's just so whacky, and the Apple PC Card and software is such a neat and tidy solution, and so far working flawlessly. just need to do a bit of tweaking so it can share the Mac's ethernet and then it's online too!