Okay another quick update.
The first bit of good news - there is no need to have registry files.
The bad news is that there is a need for INI files - this means that its a long and laborious task for me to support every drive letter.
Now this is where you come in.
What drives would you like to be able to install the stuff to? At the moment I have selected C: D: and Z: do you want more supported?