Hello all. Found the answer to the problem...credit goes to member
final kaoss!
final kaoss suggested searching the vBulletin .css templates for the statements referenced in the footer.html file...and bamm...that's where the file name of the footer image I wanted to change was referenced.
Thus I uploaded the new footer logo image I wanted to use...made the changes in the vBulletin .css template...saved the changes...and eureka...the new logo image I wanted appeared!
Also wanted to thank Seven Skins for all the help as well!
Thanks guys...really appreciate the help!!!