1) Open a word processing program such as Notepad or WordPad.
2) Type or copy the following lines directly into the new docuement:
[SwgClient]
allowMultipleInstances=true
3)Save the document to your main Star Wars Galaxies folder (usually C:\Program Files\Star Wars Galaxies) with the name "User.cfg". Be sure that the extension is listed as .cfg and not .txt or this will not work! You may have to go into the Folder Options menu (click the Tools bar on the toolbar and from there click on Folder Options, click the View tab, then click Show Hidden Files and Folders and Apply) and enable the viewing of file extensions. Once this is done make any needed changes to the User.cfg filename and extension.
4) Open Star Wars Galaxies as your normally would. Once you are signed in press Alt and Tab to minimize the game. From here simply start up another copy of SWG and you're good to go! Don't forget to use Alt and Tab to switch between games.