Please don't post entire crash logs. It makes the thread unreadable for everyone else. If someone who can read and understand crash logs asks for it, please send it by PM.
OK. There doesn't seem to be an Edit option in this forum, so I can't do anything about it.
I thought that the log was highly relevant, since it concerns such a well defined crash scenario.
If there's a mod around, perhaps he/she would be good enough to delete the log, then, and insert a sentence to the effect that a crash log is available via PM upon request.
I am a moderator, and you'll notice I already edited your crash log down to some "user-friendly" data.
First off, upgrade to 10.7.5 without delay. Pr much prefers that to any other 10.7 build.
KPs are almost always driver related. Run Disk Warrior after each KP. Reinstall new drivers if that doesn't help. Which one? The one you installed right before your KP.
Serious Errors on my system are almost always related to corruption in the Media Cache. Deleting the contents usually sends them on their way, for a while.
Delete your Pr prefs at any sign of weirdness. I need to do this frequently (several times a week), so I use Digital Rebellion's Preference Manager.