I have not heard anything about an issue between Win2000 and ASPI4.60, but if you have, it would be wise to name the source.
Generally speaking, you do not need an ASPI layer, as Win do have their own, as Nero also does (winaspi32.dll). But Clony unfortunately does require ASPI to work.
I am not aware of any issue between Adaptec's ASPIs and Roxio's drivers, although the latter have sown to create a lot of conflicts in the past
You can try the corresponding
CDFreaks forum too if you are a bit relactant