when you said "this is a config.tcl", you're right, it is one, but not the one that applies. According to that config.tcl, openacs would run on port 8000, but according to this:
also from your log:
[14/Sep/2011:10:24:34][1174.3066702704][-nssock:driver-] Error: nssock: failed to listen on 127.0.0.1:80: Address already in use
it's actually configured to use port 80, so the config.tcl you posted is not the one that applies, and there must be a different one that does apply.
Also, according to the above log entry, something else is already running on port 80, so before you deal with the db, you should fix this part.
-Jim
