well ok.. on last time the mods have been growin like on trees.
i see more and more wanna be mods grow up all over. It's just interesting if it could lead anywhere, I mean re-creating such a big game expansion pack for halflife is a big job.
good luck with that mod..
and don't forget gearbox software worked on Opposing force, professionals, you can look inside the user manual and see how many people were involved into that large project.
if you will sucess by making this mod as close as to the original product, well, then i'm just glad.