Unable to install Bentley InRoads.Suite.XM.Edition.v8.09.01.45 on Windows 7 x64

hello, i want to install Bentley InRoads.Suite.XM.Edition.v8.09.01.45.pm on my computer...can someone tell me all the pre-requisites for the software. I have Autodesk AutoCAD 2011 installed on my computer and want to install MicroStation as well.

my configurations are :

4 GB RAM

320 GB HDD

256 Kbps Broadband connection