Airborne: Find the sticky in the SCP forum about fs2dnet being up.
More or less it goes like this.
Register at the website.
Use a recent build (see the thread)
Download the .cfg file (the thread again)
Remove all .tbl 's from your root, and /data folders, plus install LS's fixes or remove speffects.vp from the root
Make a multiplayer pilot profile
Use your registration login as your PXO login (options menu-multiplyar)
Login when someone else is online and get pWnED by people in Erinyes that lag-shoot kaysers out of their ship's nether regions instead of actually pointing at you like decent folk...
