Here's what I've done.
First, CFS2 behaves very well in that it does not write a bunch of nonsense to your registry. So, that allows us to have multiple installations in different folders.
It's relatively easy to rename the CFS2 main folder , then reinstall the default CFS2 folder. Name that install as CFS2_Default. Then you can actually copy that folder to a CD, and you'll have your default setup available whenever you want... just copy the folder (with all it's contents ) to your harddrive, and it work.
The process is to copy the cd-burned default folder to the harddrive, rename it ( CFS2_Europe_1942 ), and then you can copy a shortcut to your desktop, renaming the CFS2.exe shortcut as CFS2_Europe_1942.
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The Scenery.cfg file can also be altered in each setup to allow shared folders among the setups if you want, but with the large size and low cost of harddrives, that's really not so necessary anymore.
Dick