I'm a newbie so be kind. 
I currently am getting ready to install DP under Win7 and abandon my wonderful WHS system. WHS is managing data for three computers. I have 600+GB of data on three logical drives under WHS. I am using Crashplan to back all of this up.
I have a W: drive with music, an X: drive with data and a Y: drive with lots of downloaded stuff (400+GB). Each drive has many (hundreds) folders. I plan on pooling three 2TB drives after I copy the data to them and use the technique at http://wiki.covecube.com/StableBit_DrivePool_Q4142489
Can I keep the three logical drive types with their folders using DP?
I'm going to create one more drive letter after the pool is set up that will be used for backup for my home computers. Can it be kept separate also?