Thanks for getting back to me so quickly, Ruth. So it looks as though anybody else who wants to use their earlier (v2.x) version of UFT with XP had better fix it now, while they can (see my original message). Who knows how long the cached pages will remain on Google...?
As for the problem of getting UFT2.x to work with later versions of IE, thank you for the url you quoted, but it looks as though it is just an earlier version of the web-page I mentioned (ufttech.html)in my original message.
In the case of both urls (yours and mine), while the instructions for using UFT with IE4 or 5 are still available, the link to the required download site for the necessary files (in the case of ufttech.html, this is admin.zip) no longer works.
If anyone still has a copy of admin.zip - the suite of files necessary to make UFT 2.x work with IE5 and above - I'd be very grateful to get my hands on a copy. The individual files in admin.zip are: