Using IIS 7.5 with Tomcat and ARR to re-write URL

I've tried searching but can't seem to get the answer I need.

I have some webservices managed by IIS. However, we need to host a web application run on Tomcat on the same server. The solution it seems, is to create a Server Farm in IIS, and this works for the most part.

The url we normally use to access the app run on Tomcat is localhost:8080.
By setting up the server farm in IIS, I've managed to get http://localhost to redirect to the same app. However, this creates a conflict with another app, so I want a custom path like http://localhost/Webapp/ to redirect there. How do I accomplish this?

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