So you don't clutter up the system drive I guess.

I have 2 seperate drives for recording and other stuff. You don't HAVE to use an external drive, but it's better.
Quote by Vitor_vdp
Hmmm and how many times can I install the software? Can't find this specific information in any of the papers.

What do you mean? You only need to install it once. I have EzDrummer and a bunch of other shit installed on a seperate drive and I don't need to touch it at all.
where did you get your copy b/c my copy came with all the paperwork. i believe 3 installs is acceptable, if you have to use more than that i believe you can email them and request additional installs but its at their discretion to provide them.