host access to web application on virtual using iis express

I created a web application in my virtual pc using the latest and greatest web matrix items (including IIS Express) on an XP SP3 virtual.

Is it possible to access that application from my host machine?

I know I can install IIS 5.1 on my XP virtual and access my web application remotely (from Host) but what if I don't have IIS installed and have IIS Express installed instead?