I run p99 off of a friggin USB stick sometimes on my laptop.

It's funny that people post answers to questions like this when they clearly don't have the knowledge base. But I guess when you go from no idea to having kinda of an idea it can be empowering.

You don't need separate drives or part ions. Just make 2 different directories, name them what ever you want. Create shortcuts, again what ever you want.

Blah.

It's funny when people post digs at other people when they have no reason other than being an ass. I guess when someone tries to put others down due to thinking they know everything, it can be empowering.

Just make sure you don't trash your current installation and you'll be fine. I still suggest making a backup in another directory/media, but yes you should also include the shortcuts since those also contain important information.

So to sum up my suggestion:
1. Copy entire file-structure/shortcuts to a secondary medium (flash-drive, external harddrive, zip them up with WinRAR). Especially take care of the shortcuts since those could be overwritten if they have the same filename as EQLives on your desktop.
2. Install EQLive to a separate directory.
3. Have funsies comparing Live to P99!
4. Oh, and don't worry about these apparent "part ions," your computer won't explode due to instability in their molecular structure!

Bah.