Multiple install locations for EQ?

[Dark Team]

I'm trying to make a fresh install of EQ while keeping my current install intact, so that I can use 1-8 to cast spells on my casting characters and use those buttons as hotkeys for my pure melees. When I mount the disk image though, it asks me if I want to modify/repair the current install, or uninstall it.

How do I install another EQ? :/