Sorry for starting a new thread, I just wanted to make sure it don't get unnoticed in the big one.. since I want to confirm I done this correctly before I install the RC1 
After installing the MD5 application and open it I add the Win 7 RC1 ISO file to it and then it will give me its Hash number, then I copy the MD5 Hash above and click compare right? Sorry if its a n00bish question but I want to be 100% sure I done it right and have a valid release and not one that been.. uhmm modified shall we say!
Secondly, would you guys recommend a new clean install or would an upgrade from my Win 7 Build 7000 be just as good?
I appreciate your help guys and gals, I really do!

For those picking this up from the usual sources be careful of as a number of infected iso's are being distributed. Check the MD5 before using.
Windows 7 RC Build 7100 x86
Filename: 7100.0.090421-1700_x86fre_client_en-us_Retail_Ultimate-GRC1CULFRER_EN_DVD.iso
File size: 2.35 GB (2,530,975,744 bytes)
MD5 Hash: 8867C13330F56A93944BCD46DCD73590
Windows 7 RC Build 7100 x64
Filename: 7100.0.090421-1700_x64fre_client_en-us_Retail_Ultimate-GRC1CULXFRER_EN_DVD.iso
File size: 3.04 GB (3,270,828,032 bytes)
MD5 Hash: 98341AF35655137966E382C4FEAA282D
MD5 windows app: http://www.nullriver.com/downloads/Install-winMd5Sum.exe
Edit: added more info.
After installing the MD5 application and open it I add the Win 7 RC1 ISO file to it and then it will give me its Hash number, then I copy the MD5 Hash above and click compare right? Sorry if its a n00bish question but I want to be 100% sure I done it right and have a valid release and not one that been.. uhmm modified shall we say!
Secondly, would you guys recommend a new clean install or would an upgrade from my Win 7 Build 7000 be just as good?
I appreciate your help guys and gals, I really do!