This web site has a few max scripts. One of which opens the collision files so they can be seen in max:
I used it to update the collision meshes for some of the meshes in my bfheroes mod. However I don't know of any scripts for blender sorry. You can try Gmax. From what I know I think the BF2 tools (in perticular the PoE version) should work fine in Gmax. The collision mesh scripts should run in gmax too, though I haven't used gmax in long time so I can't say for sure.