Problems installing Microsoft Visual Studio Team System 2010

Installing this software (humongous) has been very challenging. Take for example the following which I removed completly from my Windows 7 RC by restoring the system to the earliest date (When windows 7 RC was installed for the first time) since it did not work.

Tried to install  once again after restoring, the program stopped as seen here,

Here is the Setup failed messaage,

Here is the wasted time and effort downloading (hours) of programs

The installation program might have sent what went wrong to Microsoft perhaps a dozen times. I have posted the problems to the appropriate forums after each such trial, but no positive answers so far.

Well, Windows 7 itself is in RC and on top of this another beta. It is really getting out of hand.
 
Looks like I am not the only with the problems,