Impersonator is an automated "Run As" program that provides a part of useful options not included in Windows. Whis Impersonator you can create a list of programs you need to run with other's users account. And run this list from a shortcut and/or command line and/or using an GUI of Impersonator. User name and password that you are using to create the list of "Run As" items are encrypted with a mix of MD5 and RC4 algorithms.
