Multiple modules on one computer

Hi, is it possible to run multiple modules on the one computer? I've made 2 modules intended for a linked PW (using activate portal script), but when i try to load both using the nwserver program it doesn't work. Do i need to use a virtual machine for the second server or am i doing something wrong? I've spent the last 6 hours searching the internet for an answer, and it doesn't seem to be discussed. I see PWs in the multiplayer lobby that seem to be linked in this manner, so i'm wondering what i'm doing wrong. Any help would be greatly appreciated.
0