Being a Linux junky, I've always wanted a command that would work like sudo on Windows..., but being a Linux junky, I never cared enough to look for the solution..., now I find "runas."

I probably could have solved a lot of problems significantly quicker knowing that.
Just a FYI. If when you right click on an application/shortcut and it doesn't have the "runas" listed as an option, hold down left shift (right may work too) and right click. The "runas" should appear.

I beleive that the "secondary logon" service must be running in order to use the "runas" feature.

One program/shortcut that would be an example is the 2003 admin pack that you would install on an XP workstation. If you just right click on "active directory users and computers" then runas option isn't there. But if you shift, right click, it will be there.

Another quick tip.

Ever wanted to run the "explorer" program as another user just to find out that it doesn't work? Use Internet Explorer. runas the user that has more privledges and then you can use UNC paths to navigate the filesystems of the machines you want to manage. Just be sure to set your homepage to "about:blank" so it doesn't open any page on the internet. Otherwise you'll be visiting a website as the user with the elevated privledges... (eg. local admin/domain admin)