AFAIK, there are no longer any LEGITIMATE sources for an O2K3 .ISO download other than a
Visual Studio Enterprise subscription (pricey, and licensed only for dev/test).
Also, running WinXP is ill-advised these days if ever intending to connect to any sort of network (or mounting questionable .ISOs).
P.S. I can appreciate the joy of working on older German autos, and shall never forget the aroma of a MkIV Jetta's cooling fan giving up the ghost whilst in bumper-to-bumper traffic in the midst of the
O'Neill tunnel 