How to upload multiple photos

How can I allow users to upload multiple photos? I found this:

"Hi
SIMContests is coded to allow only 1 entry per user per contest. You can override this check easily, but it may affect other parts of the extension.

To override this check, go to components/com_simcontests/models/contest.php, line 664. Just set $this->submitted = 0;"

Does this still hold true and if so lines end at 644. Please advise.