Switching from 360 to PC via iMac via Bootcamp (32 bit W7 Home Prem. Ed.

Have been playing Borderlands since day it came out. Have some very strong weapons (shotgun/machine gun esp. and shield & numerous Pearls) I will drop to without risk to you to pick up. Been Mac guy since 80's. Got new top of line iMac and partition 1/2 of drive FATS at 500G and installed W7 Home Ed. which seems to be working. Got B-lands installed up to where I had hoped. Actually did the "Play Borderlands" and it cranks away till it mumbles about ports 1720 and 1722 and shortly after, it says a prob. caused the program to stop. Whereupon it shortly did and the game disappeared from the screen with no other side effects that i could notice. Anyone interested? I know I'm not the only one cuz I saw a couple of Utubes with a sim. problem. Did I mention the weapons are VERY,VERY GOOD as is the shield.