Archive:Drive Mapping

Proposed drive mappings

Currently:
U = UserData
Q = System (should not be writable)
P = Profile
Z = Temporary
T = ?

Proposal:
Q = system
This is where we install stuff, it never changes (except on update), it's not writable
Z = Temporary
This is where we store file temporarily. It's not shared between users/instances/runs. Very volatile.
U = No idea what to call this
Store mutable data here which doesn't belong to any user. Is there anything we need besides profiles.xml?
P = profiles
Give some default profile to begin with, can create more profiles. If some file doesn't exist in here, read from Q. On write, copy from Q and make changes.