RDP Certificate for Vista

Hi
if I enable RDP on Vista and connect via RDP to the machine
selfsigne
certificate is created and used for the RDP(S) connection. Is there
way t
select another the RDP certificate as in Windows Server 2003 SP1
I deleted the selfsigned certificare and requested a Compute
certificat
from a enterprise CA, but on establishing a new RDP connection a ne
selfsigned certificate is created and used for RDP
I think selfsigned certs offer a much lower security level than cert
from
companywide trusted enterprise CA

Thanks

--
pkokkinis