Thanks Tyler.....there were a total of 8 side screws that were holding down the cooktop. It was difficult getting to them because the propane line was holding the entire unit in place. Finally, I was able to prop the entire unit up enough to remove the 8 side screws. Once the screws were removed the cooktop came off and I was able to remove the inoperative "5 Point Gas Re-Igniter with Flame Rectification" and install the new unit.
Thanks, Mark S.