Force application to external Display

Hi All
This is my first post here so, sorry if i’ve posted it wrong.
Is it possible to force a application to my external display, without making it my Primary display ?

I have installed Boxee (great app. BTW) on my Imac (leo) and i would like it to open on my LCD TV (1280x768) and not my internal (1440x900) display, but i would still like to be able to use my Mac while my kid watches his Dumbo, disney, cartoon stuff… just wondering if it is possible?

I’ve found some scripts but they all make the external the primary one, so no Firefox, Dock … … …

OH yes i have no experience with Applescript …

Thanks
Kenneth

Model: Imac
Browser: Internet Explorer 7.0
Operating System: Mac OS X (10.5)