creating pool but keeping drive letter

[RBeatse]

<Windows 10>

I have a drive (P:\) that s getting very full.  I want to add a drive and then create a pool with P:\ and the new drive (we'll call it Q:\).  However, after I am done, I need the pool drive to be P:\ for other things in my system to work.  Can I just add Q: to P: and make them be a pool with P as the drive letter?  I just started using DrivePool (as is probably obvious) and the one pool I created immediately created a new drive letter instead of merging together under a current letter.

[Christopher (Drashna)]

To make sure, P:\ is not in a pool.  But you want to convert it to a pool, and continue using that drive letter for the pool's drive letter, so that it doesn't break anything on your system, right? 

If so, then you want to do this:
https://wiki.covecube.com/StableBit_DrivePool_Q4142489

And then you want to change both of the drive's letters, starting with the pooled drive: 
https://wiki.covecube.com/StableBit_DrivePool_Q6811286