design help needed:Rocktown game of the prehistoric underwor

[poppocabba]

I am working on rocktown
a fictional prehistoric world meets film noir via the dream like technology states of the flintstones. I am at the very beginning stages and am having difficulty developing some basic guidlines for the setting.
I am planning to relaes it as a free rpg from my web site, and I am alos considering the possiblity that it might just be a simple expansion to the noir system.
please contact me with any ideas suggestions or discussion