Today, a bit of struggle installed Peopletools 8.51 and HRCS 9.1 on VM Ware..
Configuration on VM ware:-
RAM: 1GB (out of my 3GB)
Windows XP SP3
Micrsoft SQL Server 2008
Tuxedo 10gR3PeopleTools 8.51 (3 Parts)
Firefox 3.5x or IE7/8/9.
Overall the performance is good. the more performance I see after increasing my RAM 1GB to 1.5 GB.(2GB it is very good for to work)
Now the time to research...!!!!!!!!! :-)