Ok, sheesh, I feel like a moron. I changed the colspan to colspan="5", added the forum moderator code above to the template mentioned ($forum[moderators]), and switched it to display the mods column. The result was the standard display of the standard moderator column down the side, that I didn't want. What the heck did I do wrong?? UGH.
Thank you very much for help by the way, I really do appreciate it.