Is this the error you're getting?
http://www.lucasforums.com/showthread.php?t=202740There is more than one patch. The FOCUpdate1_1.exe patch fixes a lot of things, but maybe not your problem. The other patch is for 64-bit Windows. The patches are described on the LucasArts site, though the links on that page don't work anymore (don't know if that happened before or after the Disney takeover)
https://www.lucasarts.com/support/update/EAWFOC1_1.htmlIf you want the 2nd patch, it's at Gamefront
http://www.gamefront.com/files/20715796/FOC_RAM_MPLobby_update_exeFrom the description at LucasArts, you have to install the FOCUpdate1_1.exe patch first, then the FOC_RAM_MPLobby_update.exe patch.
Of course if none of that works, you can try opening the case and removing some of the RAM. And the problem could be elsewhere -- for example your video drivers might be "too new" for the game.