Multiple ez versions on my PC!

Hello, I am developing several sites in different versions of Ez, 3.10 and 4.0.1, as they use different configurations (php) I would like to have both instalations running at the same time and each time I access one of the sites it should be served by it’s own configuration.

I have installed the ezpublish bitnami and works fine but need to run ezp 3.10 sites too.

Has someone sorted out what to do? It’s very confusing for me how to deal with a problem like this one.

Please help, thanks