I can't believe this question wasn't already asked. I came across the answer when asking a slightly different question.
Lets say I am logged in as user Bob and I open up a command prompt via the runas command with Alice's credentials. How do I launch explorer with Alice's credentials from the command prompt.
If anyone has a better answer, I'll wait a bit before marking mine as the accepted answer.
Its possible to configure explorer so that all folders windows are separate processed for that user. To do that launch explorer as the user you want to be able to run explorer as through the runas command then select "Tools | Folder Options". From there check the box labeled "Launch folder windows in separate process," as shown below.
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