Shawn,

As long as they are installed to different folders they can both run on your system.

>I am currently developing in 5.0a.
>
>I would like to install 6.0 on the same machine.
>
>Does anybody know of any problems with having both 5.0a and 6.0 installed on the same machine?
>
>Are there any runtime .dll conficts or any other potential problems?