two versions of linux9 at ftp site

[pamntom]

A pre-installation question:
 
I see two versions of linux9 at the redhat website.
I have a P4 (Dell) running WindowsXP (currently)
 
Do I want to download the: "shrike-i386-disc?.iso" (1,2 & 3)
 
Or, do I want to download the: "shrike-SRPMS-disk?.iso (1,2 & 3)
 
Also, there's a 1K file called MD5SUM. Do I need that as well?
 
Please advise.
 
Thank you,
 
Tallen
 
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