How do i make multiple installations?

Having started to play BG:EE at last and liking it much more than Tutu, I want to run multiple campaigns that function separately on the same computer, just like I used to.

With Tutu, it was as simple as creating a copy of the game folder and start from the bgmain.exe in the new folder. The only thing you needed done if you modded the second install to be different that the (vanilla) original is make sure the baldur.ini points to C (or whatever drive):\the new folder\data.

You could make copies of the vanilla game, mod each one differently, or make copies of an existing modded versions which would thus have the same setup, but it's own save, portraits and character folders (while you could save space by having separate instalments share the same bg1data, movies & music folders).


Now I wonder how to go about creating separate installs for BG:EE?

If I just copy the contents of the installation folder into a new folder and start up the Baldur.exe inside the new folder (like I would do with Tutu), it uses the same Baldur's Gate Enhanced Edition folder in Documents as the original, with the same save folder, so I can't start up a separate campaign that way.

I dare not use the GOG installer to create a fresh copy for fear of messing up the install I got now.

Is it even possible to create separated instalments of BGEE on the same computer or would I need to start a separate Windows user account just to play another (separated) campaign?

Sorry for the longwinded way of asking a simple question. I hope someone can give me a (preferably simple ;-) ) answer.