Yep, I'll definitely do that.
Just wanted to be sure. I hate it when you get to the point that you realise a decision you made about 67 savegames ago is why your game is messed up now.
That said, TS3 has been running pretty smooth for me so far. In hundreds of hours of play it's only crashed once (by dropping me back to the desktop) and once (by giving me a weird error message).