I'm running Pyffi 2.2.2 with Python 3.2.3 (x64) and using the http://oblivion.nexusmods.com/mods/37463 to optimize the original Oblivion and SI meshes on a Win7 x64 setup. As soon as I exit the tutorial sewer section into the outdoor, the game crashes in the beginning of the loading bar. In another save, where I'm inside the Imperial City Market Dist. the game loads, but again when I exit the IC into the outdoor area, the game crashes in the beginning of the loading bar. I'm following instructions for the optimization kit to the letter. This is a completely unmodded latest patched oblivion and si install. Any suggestions? Thanks.