There are some nice SWG mods such as a full DX10 update that SOE will never do that fans pulled off over at swgmods. They really bring the game alive by adding a flavor of star wars and graphic updates made by fans for the fans. That engine is so toned down with all the graphics turned up compared to when it was in development. The lag comes from the fact that the engine was never meant for the NGE combat system as it is coded.

To the OP you really need to upgrade your PC. This game is seven years old- no offense. My second PC handled it fine with a nvidia 7800. Before that I cant remember what I had back in SWG beta. You can get a good deal for older hardware that will work fine.

The game as it stands now is better then it was when the "NGE" was released. It is a million years better. I still miss the skill system and a lot of time was wasted having to repair the damage that LUCAS ARTS and SOE did with the way they launched the NGE when WoW started to kick their ass. But I still love the player house system and crafting.