My problem is summarized in the title; I'm familiar with the file architecture of the game and have made sure that my (admittedly bloated) selection of mods manage to load properly without any errors.

However, upon starting a mission everything is immediately shot to hell (ANY mission, mind you; last time, I received a crash to desktop on starting the modded-in Firing Range scene).

Frankly, I have no idea what could be causing this.

Could anybody tell me if they have also been experiencing crashes ONLY on mission start, when everything else is also in order?

EDIT: At the moment I am copying my CC installation out of my Steam directory, and by extension removing it from Vista's notoriously problematic Program Files.

actor viewer seems to work, however