Should you by any chance encounter an error with mso.dll while trying to start Outlook (well, I hope you don't use it a home...), try and delete outcmd.dat. This file only contains the configuration for Outlook's menus and symbol bars, so it's probably not a great loss.
Yet, I do wonder why Outlook crashes without any apparent reason just because a 2kb (sic!) file is corrupted. Micro$oft could learn a lot from things such as "/var/log", I guess.