IIS 7.5 and redirect to tomcat

Hello,

I have two questions to the connection between IIS and tomcat -> isapi_Redirect:

1. Did I have to install and configure the isapi_Redirect function on the same windows server, where also the tomcat is running or can I use a other IIS Server and make the Redirect to the other tomcat Server?
2. I have installed two hello world exampples at my tomcat. HelloWorld1, HelloWorld2.

The URL's for thoose applications are on tomcat:

http://localhost:8080/examples/servlets/servlet/HelloWorldExample

http://localhost:8080/examples/servlets/servlet/HelloWorldExample2

Now the secound question: I would like to open thoose URL, with two DNS Alias over IIS:

When I type in http://zhelloworld1, then the URL at tomcat should openhttp://localhost:8080/examples/servlets/servlet/HelloWorldExample

When I type in http://zhelloworld2, then the URL at tomcat should openhttp://localhost:8080/examples/servlets/servlet/HelloWorldExample2

How can I configure this at IIS, twoi different alias should open two different apps at tomcat?

I found no discription to this case.