Hey Firesoul, nope, I don't have a Firewall. I have not clue why OP just doesn't work for me on GSA. I agree with you, I prefer OP to EAW anyday. I was one of those guys that thought OP just didn't have any more features that warented it, but I"m glad I found out differently! I only paid 9 bucks for this baby a few months ago and never regreated it since.
As for my Multiplayer problems, I have no clue why I can't play the game against anybody. I have tired everything I can think of and it still doesn't work. Good news is that I was able to install SFC1 Gold and have had no problems playing multiplayer games on GSA with it. At least I can play some SFB rule with some people with it, but even 4 years after it was published, SFC1 is still a fun game to play.
On a side note, I'm about 85% complete with my first ever SFC model. Its based on SFB rules and such and I'm really hoping the SFC community (especiall the SFB fans) like it. I'm still a novice with Milkshape, but I'm getting better and this model is not bad in my opinion with such a simple 3D program.
I just hope the next OP patch can solve my problems.