Paul, I had the shop install the mobo and drivers, but as soon as I got it home, I disabled the audio in the bios as I only want the Delta sound card.
This is easy to do and it is spelled out in the mobo manual, if you have it.
I'll be glad to give you specifics when I get home from work.
Then again, it doesn't sound like you want to disable the integrated audio. Do you?
There are quite a few homereccers who use this mobo. I think Stealthtech is one of them. He sounds very knowledgable. Do a search on Asus P4PE and you'll find a lot of talk about it.