Sysinternals to the rescue! There is an option added some time ago to run a command as a limited user.
Usage: psexec [\\computer[,computer2[,...] | @file][-u user [-p psswd]][-n s][-l][-s|-e][-x][-i [session]][-c [-f|-v]][-w directory][-d][-<priority>][-a n,n,... ] cmd [arguments]
-d Don't wait for application to terminate. Only use this option for non-interactive applications.
-e Does not load the specified account's profile.
-f Copy the specified program to the remote system even if the file already exists on the remote system.
-i Run the program so that it interacts with the desktop of the specified session on the remote system. If no session is specified the process runs in the console session.
-l Run process as limited user (strips the Administrators group and allows only privileges assigned to the Users group). On Windows Vista the process runs with Low Integrity.
Specifically I'm recommending running
psexec -i -d -l "your command here"
This will run the command interactively, (so you can see the results) detached, (so the command line returns immediately -- not strictly necessary), and as a limited user.