Trying To Get My JMail HTML Message To Work With My Site

I have been trying to get the JMail.GetMessageBodyFromURL
"http://mydomain.com" command to work, but all I get back is a very sparse
HTML message in MS Outlook 2002 on WinXP SP2 UK.

I've checked and made sure that Outlook can accept HTML emails, but the
problems I am experiencing are:

a) The placeholders are there, but none of the pics come through.

b) The external stylesheet has gone out the window.

c) If I click on any of the links a dialogue appears asking where I want to
save the exe.

I have a feeling that problems (a) and (b) relate to the fact that the paths
are relative to the site and Outlook needs the absolute, but how can this be
easily corrected without changing the whole site?