Fonts

Hi,
I wonder if someone could help. I have a number of users
on a domain logging on using roaming profiles. Most of
them are on service pack 3.
When I install a font signed on as administrator on their
PC, they then sign on as themselves (as just a user) and
everything is ok. They then sign on the next day and the
font has disappeared out of the Fonts folder and I have to
re-install it.
Two questions - 1) Anyone know why this could happen and
2) Is there a quick and easy way to install fonts in a
domain without having to log onto everyones PC (I use VNC
as the server is a bit too old for TS).

Thanks for any help,

Alan