HI, sorry it so long to respond.
Actually, the how to create this Drive (disk) Space Report came from Sql Server Central.
Right here is the link:
http://www.sqlservercentral.com/scripts/Administration/67064/
And I attached my .RDL, so I hope this helps you guys.
It wasn't too hard at all. Just have to make alot of data sources to all the servers I wanted to monitor. Have fun. Let me know if you have any questions. 😉
ps. I hope I attached the .RDL correctly.