Thank you and I am glad that you responded!!
Under the ClockworkMod Recovery, (Choose an image to restore)
I backed up and flashed my default system, and the program named it:
-2011-12-29.03.29.13/ and to make it more simple (so I assumed) I renamed the file to: Original_HTC_EVO-4g_Sense_(Factory_Deafult)/
Both files will display an MD5 mismatch!, when selected for restore. I understand how to mount the USB, in the recovery mode; however, I am lost there after. I do not know how to move or edit the file. or how to acess the SD, in order to fix the MD5 mismatch issue.
Any help would be greatly appriciated!