messages with embedded html

[Mark]

How can a resource bundle string have embedded html so that I can have a 
message like:

form_entry_help=Enter the information in the fields provided.  Fields 
marked with <span style="color: #00f;">*</span> are required.

I know the answer probably is that they can't but you can't blame a guy 
for trying.  Could I use a string resolver for this, something like:

form_entry_help=Enter the information in the fields provided.  Fields 
marked with {0} are required.

Thanks,
-Mark