i was looking at the complete 2009 mod for this game and It really looks impressive for the graphics, but I also saw the supermod which looks really good, I was wondering if I would be able to combine the 2 mods?

or if anyone has suggestions for mods that could improve the graphics and add or tweak the weapons. I would really appreciate the help^^

I'm not the most knowledge about how to install most mods easily, so I might need some trial and error. Most experience I have is installing source mods which are pretty easy.

Aren't both those mods a combination of a ton of other mods? In general you can combine them but since these two change so much there may be conflicts. Ask around the game's community.

Good luck :)