If you still have Quake one there is a patch and several maps on my CDrom in the Games folder (actualy on the cd, not installed onto your PC)
I modified all the monsters and weapons to be more neolithic, Bow & Arrows, spears etc instead of ray guns.
Maps are Avebury, beckhampton and kennet ave, WKLB, Weyland smithy, stanton drew, seahenge (With pirahna's)
and of course Stonehenge.
Frag away!
PeteG