It's been said before, but I'll list it chronologically:
1) Install FAM (Freelancer Account Manager), links have been posted above
2) Log onto a different user account (or create one if you don't have more than one), user account being the account you choose when you turn on Windows or Mac or whatever.
3) Open FL on that account, and select "Multiplayer". You can create a few characters on the servers you want *hint hint, Discovery RP 24/7*.
4) Open FAM on that account and click the "Scan" button.
5) Click the "Export" button, and save the account ID somewhere you can access from your other account (i.e. shared documents)
6) Log back onto your main account, and open FAM.
7) Click the "Import" button, and find the file you saved.
8) Double-click the account you want to use, you can create 5 characters per account.
That's all, hope it helped! Might have a couple errors, but in general that's the idea and should be correct.
THEY TOLD ME I COULD BE ANYTHING SO I BECAME A SIGNATURE PLS HLP