can you drive two cars at same time? i don't think so.
you can not install same program on one partition twice (or more)
so, make another partition, install OS on that partition and then
programs you want to try out (be careful with that)
You cannot install two instances of the same version of any Autodesk
product, at least as far as I am aware. You can install two different
versions, say AutoCAD 2002 and AutoCAD 2004. But even that will
sometimes cause problems depending on the product and which order they
were installed in.
When you try to install the second time, no matter how many profiles
you want to make, the second install will want to use the same
registry entries in Windows as the first install. Even if you have
other drives in your PC and direct the install to another drive there
is only one registry. One or both of the installs will not work
reliably, if at all. If you have AutoCAD 2004 and a newer version you
can install them on the same PC because after version 2004 Autodesk
did support two or more versions on the same computer.
I think you could just create another user account on your computer and
login as that user to have a different profile. You should be able to
create as many users as you want. This would be easier than booting into
two versions of the OS.
If you are not part of a domain than you could use fast user switching
and be logged in as two users at once and test customization on the
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