i haven't read the MS KB article you mentioned, but there's no problem at all with multiple recorders using mastering software (or packet writng software for that matter) under winXP.
i'm sure that article is discussing the built-in capability of winXP.
(and who would want to use that piece of $#!^ anyway????)
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the land of Mordor, where the Shadows lie
M.C. Escher - Reptilien
1. The KB article was incorrect, or;
2. It may have been written based on the pre-release XP code, or;
3. An update has been issued to fix the alleged problem, or;
4. Most folkes, being sane, have ignored the built-in XP software, or;
5. Most folkes have just 1 writing CD drive on a system and would not have noticed any such problem.