Bon Voyage Expansion – Issues (choppy gameplay)

I got pretty frustrated with the new Bon Voyage expansion pack the other day. The first couple I sent to Twikkii island did all right, but there were some major performance issues with the next couple. Suddenly the gameplay became very choppy and jerky -all actions would go step-by-step instead of a nice fluid motion. Now, this couple had a lot of memories and friends, I have all 6 expansion packs, and I believe there was the maximum of 8 sims on the lot, so maybe that put a toll on the rendering. I have a 2.4 GHz Pentium 4, 1.5 GB RAM, NVidia GForce 6800 GS/XT with 256 MB memory. I updated the video card driver, and it seems much better now. Unfortunately I’m afraid to try to increase the graphic settings in the game to a higher level; they are currently at the lowest setting.