Question regarding Rooting

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http://forum.xda-developers.com – I'm somewhat new to Android operating systems. I had a iphone for years, knew how to jailbreak and such for it. Android is a little trickier I feel. I was following Team Epic's thread to root my galaxy. I get to the point where I have to download CWM recovery file. I download the file, but it won't let me extract it because its a md5 file. I downloaded different file readers so it will let me correctly read and extract the file so I can load it into the PDA part of Odin. I use the file it gives me when I do extract it, which is incorrect I guess, because I get this error message when I s (HowTos)