Configuration: Customer Portal 4.0 on Microsoft CRM 4.0.

Whenever a customer goes to our customer portal, it loads pretty slow the first time - too slow to be good.

Once the logon screen has been loaded it seems to be in cache or something, because from then on it loads at a normal speed.

Any suggestions on how we may "keep" this in cache or whatever so that in general it loads faster ?

Many thanks in advance !

Benoit.