We recently released an updated version of Litware HR sample application that runs on Windows XP.
This updated release answers the feedback that we are getting from the codeplex community to have a version that most developers can run and test on their machines.
Initially when we designed Litware HR, we wanted to have an implementation that runs on an OS platform that is closer to real production environment, so that we can demonstrate scenarios such as allocating each tenant their own IIS 6 virtual directory. Hence our decision to have the first release implemented on Windows server 2003.
You can download the Windows XP version of LitwareHR from here: