Paralel testing of 2 web applications

I have front and back end .net applications running on a window xp professional and visual studio enterprise architect. I would like to run both applications in paralel, but I am not sure if that can be achieved. One solution is to adjust default website dir in inetmgr and then separately run each application. Any other solutions?Hi Mko,

What exactly are your trying to test in these application... performance, reliability or something else ??

Cheers
Just reliability, but since they are front and back end apps they share certain level of information. I am trying to figure out is there a way to do this without switching to a server OS..
We actually have the same situation. Backend app and multiple front end apps. Since XP only allows you to run one site at a time there is no real way to do development on a single machine. There are several http/isapi handlers out there that simulate multiple sites. You can find one at http://h4ck3r.net/ called iis_multiplex. One problem I've found with it is the integration of VS.NET/Source Safe and IIS. If you just need it to test your sites it might work for you.
I cannot get it to work..it's not mapping correctly