I've gotten into the habit of installing (winXP) applications to my C drive and data, program updates (or service packs), program information, images, and project files on my D drive. I've also found that using the default install paths usually makes life easier later on when updates are installed. It makes for a large "Program Files" directory, but by creating a few desktop folders such as "Graphics" and "Utilities" and creating shortcuts in those folders to the applications is a way to keep organized. My data drive (D) looks something like this: d:datagraphics ...Bryce55 ...updates ...info ...scenes ...in_work ...ready_to_render ...done ...content ...materials ...objects ...skies ...Poser6 ...updates ... and so on ...DAZ_Studio ...updates Anyway, there's many ways to organize, and the key word is "organize." By keeping your data separate, you can install a new operating system on C and after installing your applications, grab the patches and updates from the "data drive".