Login to SQL, then Database>RanUser>Tables>dbo.UserInfo>Right Click then Open Table.
On the NULL data's:
Put Usernames on Column 2 and 3 (UserName and UserID), then type in Passwords in Column 4 and 5 (UserPass and UserPass2).
There's two of them because one is for deletion and one is for account name for use in websites...I think (I dunno I'm new here so sue me for having theories lol).
On Passwords depending on EP and version of ran you have, you might have to use MD5 passwords so you need to convert your passwords into MD5. Look for IANZ MD5 Converter.
If you really can't wait to try out your server, here's the MD5 code for password "123456":
E10ADC3949BA59ABBE5
Be sure to press Enter each time you type in something on the columns or else it'll just be reset after it gets executed.
Well after all this, just go and execute, lol. It'll have an automatic game-designated UserNum number on Column 1 after execution.
Hope its not too long or whatever, lol.