I've recently encountered some problems (http://www.dvinfo.net/conf/showthread.php?t=116793) with Premiere Pro CS3 and am planning on re-installing PPro 1.5.1, likely leaving both on simultaneously.

I'm assuming I'll need to re-install Aspect HD as well, but will it update both versions of Premiere when I do so? Or is there another recommended procedure for what I'm about to do?

Aspect HD installs in 1.5.1, 2.0 and CS3 automatically.