Running an ?action on a subdomain

[Burpee]

I thought it would be a nice idea to make it possible to run individual ?action's belonging to SMF on seporate subdomains.
For example, ?action=arcade will automatically forward to games.site.com, and change all of the links pointing to the arcade action to the subdomain.

However, I'm not well skilled enough to think of a "simple" way to do this. My solution would involve modifying pretty much everything in SMF to get this to work.

Can anybody think of a "simple" way of realising this?

[B Patterson]

perhaps a .htaccess file could do this..... something with the QueryString variable and looking for certain ones.

I know that would do it for the Apache users out there, but for windows... not so sure....

[Burpee]

Just thought of something. Perhaps it would be easier to extract the action as a seporate script onto a subdomain, running it completely seporately. Does that make any sense, or am I just complexifying things now?