Okay, so I subscribed to all the mods I wanted for TSL last night and then exited out of Steam. I decided I wanted to play on the game some this afternoon and see how the mods turned out. I was quite disappointed to see that none of the mods were working at all.

It wasn't until after I had already finished Peragus and in the middle of my protracted conversation with Kreia on the Ebon Hawk that I realized I had not restarted Steam so as to actually download the mods! So I saved my game then and there, exited, and entered Steam.

So my question is this: How important is it that I delete that game and start over? Do I need to? Did I miss anything necessary to the new content for it to work properly later on?