pct = percentage.
the folders never go more than 2 deep. project and subproject. Experience has shown that having these folders is invaluable. I store all email, even things that don't require an action. I shoud give them an action code. like BST
the task level tracking would be like thinkingRock. nothing to really to do with email storage.
I want the folder bound to a project just for the GTD functionality of moving the file. I don't like having to select the folder, then go and select the project and the subgroup. double work and would make it go faster IMO.