[Zope] modifying resolve_url method

[Steven Turoff]

Greetings,

I am new to Object Oriented Programming and want to know what the best way 
to modify the resolve_url method is. I need to add one line of code to this 
method. I'm guessing I can edit lib/python/ZPublisher/HTTPRequest.py, 
recompile it, and restart Zope. Is there a better way?

The reason I need to do this is because I am using a SiteRoot and zope is 
generating a "Different Namespace" error when I  do something like 
<dtml-var "REQUEST.resolve_url(URL1)">

Thanks,

Steve