Help with N20

I'm have a friend with a 99 Camaro LS1 Automatic. converted to an 2002 os
The tune that is on it right now is very good, compared to the stock one. He loves it, but now he bought a 100HP wet kit.
So I guess the best thing is to change to Cos5. but I have no idea how much timing to pull and from what areas. Any ideas

Attached is the current tune

Thanks,
Josh

Bump for you.

seems nitrous is a little tuffer to tune then I though it would be.. Have you figured out anything yet?

You may have to research what other people are running their AFR and timing at.