Is it possible to run two copies of Poser simultaneously on the same computer? Either as two separate sessions, or having two copies of the program installed in different directories?

I had Poser 8 previously installed and tried to run it at the same time as Poser Pro 2012 but it didn't seem to work and Poser 8 just wouldn't load. With a program like Bryce, it seems you're able to run two or more sessions at once. In other words, if you click on the Bryce icon again, it opens another session, and you could work in both of them on two different scenes.

I'd like to be able to do this in Poser. Sometimes it takes a long time to either clothify or render something that I'd like to be working on a different thing in the meantime. However, I can't, because Poser is occupied with that activity. I know clicking on the Poser Pro 2012.exe file twice doesn't open it in a separate session. But what about if I installed another copy in another directory or on an external hard drive, and then ran both of them using the same shared runtime?

The only concern I have about running two copies of Poser is that even one of them can be so taxing on the systems resources that I can't imagine what two of them would do.

Has anyone done this successfully, and if so, how exactly?

Thanks