2 domains 1 Terminal server

Hey

ok so not a high priority question but if anyone has the answers it would be great because i could boost productivity of my users and make bosses very happy.

Ok so ive been managing a single server SBS2003 setup with domain name a

recently set up another network that has an sbs2003 and a server 2003 running TS which has domain name b

what i would like is if i could get the terminal server on domain b to run terminal services for domain a (to allow remote connections, single install of software, etc etc)