import registry key remotely

Hi all,
I have a .reg key file that I need to import into workstations on our domains now and then. Luckily for me, the key is in the same location per machine, so that makes things a little easier. Bascially, a key gets changed when an event occurs, then the user will call the helpdesk. I'd like to have the helpdesk be able to double click an icon, be presented with a bix asking for the hostname of the PC, then they submit, and the key changes. A reboot is not immediately required, and I don't care if we have to use a copy command to get the .reg file to that PC, then a psexec command to execute it. All the helpdesk members have admin rights on all enterprise PC's, so permissions will not be ab issue either.
thanks so much. I am a very sloppy scripter, but might be able to figure it out with lots of research, trial, and error, where I am sure there are some killer scripters who know this stuff by heart! I hope, and thanks.