Asymetric IPSec transform sets - Inbound vs Outbound

Guys,

So, I think i'm spending too much time in the books and theories, but I
gather that its possible to configure different transform sets for the Phase
2 SA's ( inbound vs outbound)...with repect to the tunnel endpoints.

So is this really possible? First try didnt go successful, but looking at it
again, I have a few doubts that might need clearing up.

So in total, on each peer, how many transform sets do I need (if this
convolution is even possible to begin with)? 2 on each side (while swapping
the ordering of how they are bound to the crypto map?) thereby making them
asymetric sort of?

Thanks in advance as usual,
Sadiq

-- 
CCIE #19963
Blogs and organic groups at http://www.ccie.net