Doubtful that your programs will work. If you have to have a certain program, install it onto your wife's machine - you can always delete it once you get squared away.
You can access your files as if they were on the original computer - copy them, open them (assuming that you try to open them on a computer that has the host program), delete them, etc.
As for OE emails - verify this because I use Thunderbird - but, I think that you can simply import them into your wife's OE. Not sure what happens to her stuff but suspect that you will have all emails in the one account. Maybe the best thing to do is to create a new user acct and use OE to import there; then, your wife's account will stay "clean."
Good luck!