It’s not as good as the Floorgenerator from CG-Source.
It needs alot of improvement.
If there is a developper around interested in coding the floorgenerator for Blender 2.6 I would donate for him 
Kind regards
Alain
i think i may have it or another free one
but i cannot generate large area floor !
shoud ask queston in python forum
someone might be interested to port it
or may be ask the author of the script
may be he can do it for 2.6!
but would need to give better resulst also!
salutations