If keyclone doesn't work for you, you may try HotKeyNet .
Honestly I don't know if it works with Vanguard, but as its free and offers different SendModes you may simply try it out.
A basic guide how to setup a script you can find in my Signature or on the HKN-website.
If you need any help feel free to ask (here or on the hkn-forum) and i can try to give you a sample script..
(therfor I need to know ho much instances you are running on how many computer with what screen layout...)