Inserting original disc for upgrades and reinstalls appear reasonable and sufficient. BUT - Please drop the "insert original CD" for importing presets. It is irritating especially when you keep your computer in a room separate from keyboard and monitor.
In addition, you already have one layer of protection when downloading preset from your site since only registered user have access. So what is the point of having to load the CD to install presets?
Thanks for your consideration.
Lavot