My network is that way:
I would like ASA1 can access PIX network and ASA2 Network
As well I would like ASA2 can access PIX network via ASA1, and ASA1 network
And finally, I would like PIX can access ASA2 network via ASA1, and ASA1 network
Is it possible to do so?
Yes, it is possible to hairpin the traffic on the outside interfaces of the ASA's to get the traffic over the tunnels to the pix.
You need to enable same-security-traffic permit intra-interface. You also need to add the traffic to your crypto and nat exemption acls(only if running outside nat). Here is a good doc with an example...these are pixes, but the config in the version 7 pix is pretty much the same.
Please rate if it helps.