Hey. I'm now at lvl 45 and I had unlocked all the weapons in the game, but i diden't get the "tooled up" trophy. What do I do?. Play to lvl 50 and re-boot or do I need to use every weapons before it unlocks ?

A lot of people have had this problem, including me. Post your findings in this thread to keep them altogether
http://www.gamesas.com/forums/viewtopic.php?f=42&t=22112

Its good to see the hundreds of people telling Crytek about these problems. Maybe they'll ACKNOWLEDGE it soon. Hah, what a joke.