daletoo

Getting ready to make a splipstreamed XP Professional CD to incorporate Service Pack 3. Question though, and I couldn't find a definite answer on Microsoft's website. If I am slipstreaming from an ORIGINAL XP CD (does NOT include SP2), does SP3 already include everything from SP2, or do I need to slipstream BOTH SP2 and SP3? Also, if my original CD includes SP2, is it better to slipstream SP3 against that, or go from an original without SP2?