I wish I could explain my lack of problems as well so everyone could have as much fun as me. Even the mods I had installed are working just fine as well.
In fact, my system is running even smoother at the moment - I'm not sure if it's because I chose a new campaign with the Ottoman Empire and they just interact less or what, but I'm not complaining - apart from the fact that Darth Mod made everything more aggressive. Dagestan and Persia tore me to pieces and took four provinces off me (the last of which was a tribute in a desperate attempt to make peace and give me a break). It's taken me a further 15 turns to recover my lands and move into Persia-proper. Had some really titanic battles as well. Really enjoying this campaign. I'll probably end up pushing into India, rather than Europe, but I might tickle Russia just for a few battles, as they might be fun seeing how my troops manage a European army