Hi, i have good news to report.
At the moment i'm patching games with CMS support to work on different ports other than the default 220h. I have an original CMS/Game Blaster card which conflicts with the Sound Blaster Pro 1 i have, so i decided to change the port on the CMS card for 210h. I already have several games working using a non default port. I'm still trying to figure out other tough ones, and i actually would appreciate if someone with asm programming experience could help me on this project. There aren't a lot of games left to patch, and after properly documenting it will be very easy to make a program to just patch games for any port we wish. I don't see any problem with patching to port 0378h.
I already managed to defeat the auto detection routine in a game called Altered Destiny, which requires a true CMS/Game Blaster card. Now the game will also work in a normal SB with CMS chips in any port i want. I have other games patched too, but still some tough ones to go.