original message, skyrim started ctding after using these tweaks, attempting to remove tweaks broke game, etc, etc... Edit: nvm, Fixed, after some general panic and trawling around I found this post from a year ago All working again, many thanks ecirbaf, and I will be a lot more careful if I ever mess with ini files again :biggrin: Do have a new question though. Using these settings I was getting great visuals, no noticeable drop in framerate and everything was going great until the ctds started 2 hours into playing... uGridsToLoad=9 uExterior Cell Buffer=100 iPreloadSizeLimit=4294967296 Any tips on stopping the ctds? System is OC'd GTX560ti, FX6100 (6 Core, 3.2GHz), 8GB RAM.