If you are using RWs on a regular basis, get a copy of Sonic DLA (Drive Letter Assignment). It formats the disc in standard UDF (Universal Data Format) but assigns a drive letter and volume name like a hard-disk partition. This kind of fools Win XP into treating the RW as a hard-disk partition - you can drag & drop, delete single files or folders, and so on. Once DLA has been used, I have been able to use +RWs in two different DVD-RAM drives without any additional software. It means no temp folders either, as the files just go straight to disc, unlike Win XP's CD-RW handling.
If you don't use DLA, you'll need Nero or similar to handle the writing on behalf of Win XP. And you won't be able to use the disc on a PC that does not have any third-party software like Nero, unless Nero now has a DLA equivalent of course, but I don't think it does.