The only tool that's able to deal with both types of registry is Regview, by the "General Paul Lee". Version 4.2 is quite stable, although not very intuitive to use: supposedly, if one starts it with no parameter, it would allow one to navigate to the file of interest, but I've never been able to get that part to work OK... when, however, it's run with the name of the target registry file one wants to edit as 1st and only command line parameter, it works like clockwork. However I've never used it to modify multi-string values in the XP registry, so I cannot guarantee it works as advised with thouse types, which are the main difference between the XP and 98SE registries. With the 98SE registry it just works.