You should check Ebay for Windows 98. You can often pick it up for not much these days.
As far as I know, the reason people are telling you that you probably need a Windows 98 or above operating system for using their service is becuase many people connect via usb and that basically didnt exist in those days or when it did, didnt function very well. Windows 98 or up had USB support.
Though ethernet is better than USB .
You would be better getting Windows XP for the better Wireless facilities & internet and networking environment.
You would also benefit from updates to get the latest security patches.
Windows XP home is about £58
http://www.scan.co.uk/Products/Produ...oductID=134165