I agree with Foxhound. I have the version 1.07 that has just been released and it runs great in my other computer. My profile picture is a picture from my main computer. I also wanted to play the game when I was in my grandparents house so I installed it there too. At first, the game had no problems with textures or sky.
After, I installed patch 1.05. The sky has been cut out ever since...=\
Maybe I'll try reinstalling (I'm lazy =P) but thanks for your advice with the mods too. I'll just copy them all to a temporary folder, delete them from the main ArmA II folder, reinstall, patch the game and place the mods again =) Thanks for your help. If it does not work I'll write again =).
If you have any other suggestions please post them here.
Cheers
ADDED DAYS LATER:
Ok, so I have the picture set up, hope it works for you guys =\