Does anyone know if...

A) it is possible to have iTunes installed on 2 different machines and have both installs sync to one iPhone and;

B) How i would go about setting this up if it is possible?

Right now I only seem to be able to sync my iPhone with the install of iTunes that i have on my desktop machine which actually sucks because i have about 2000 songs on my laptop that aren't on the desktop and every time i go to sync, i keep getting asked if i want to delete everything on my iPhone from the sync using the desktop.

I figure this must be possible right? I mean most homes have more than 1 computer these days.

Regards,

Lee