Not that hard to port actually, there's a tutorial here somewhere.
Someone correct me if I'm wrong, it's been a while, but I think the weapons hardpoint numbers were reversed between 1 and op and to light it you just need to add the *_i.bmp image to the model folder.
Last conversions I worked on were EAW/OP to 3 so I might be thinking of that on the hardpoint thing.
*waits patiently for someone to tell him he's wrong on both counts*