You don't need another OBD port, just use the one you have. What you need to do it take the K-line from the ECU directly to the port and bypass everything else on the bus, like the cluster, to be able to log and flash with no issues.

Now I'm not saying what I did is correct, but the post below details how I tackled the problem. I was tired of pulling the fuse and messing around to log and flash and wanted a more permanent solution. I had the soldering iron out for another project and a few beers in me and this is what I came up with. It has worked flawlessly so far. I put the switch behind my fuse door in the trim panel for easy access. Want to log, switch to bypass. Want to scan something else on K-line, switch on normal. All you need is one double pole/double throw switch and some wire:

http://nefariousmotorsports.com/forum/index.php?topic=6679.msg70602#msg70602

Yes but you won't get EGT up to where to need to to judge if you have it under control, and your boost PID really needs to be tuned at all gears (you don't really have to run it to redline, but you do need boost spike under control).

Also, if you are using LAMFA to do primary fueling, the time constant will cause fueling to behave differently in every gear.