You have a couple options.
Contact Zubby (If that is who made the mod) and ask him how to do it or if he has time to do it for you. I recently heard he is not working on IndexU stuff right now though, he is busy with other obligations. You should try him first. His site is at Directory of niche and regional/local directories only - IndexU Directory.
Or, if Inspireme made it, he is no longer around. You can move to the options below.
Or, you could open the php files yourself and try to figure out where the allowed file extensions setting is. Look for gif, jpg, etc.
Or, you can send the files to me and I will take a look at them for you. I ask that you please try to contact the mod creator first though. If he does not have the time to fix it for you, then and only then will I look at them for you. I don't want to get Zubby angry at me for stepping on his toes. My contact email is below.
Regards
Wayne
Last edited by mpdaddy; 12-02-2008 at 04:10 AM.
For questions related to any mods I developed, please contact me by pm or email at webmaster [at] scriptdragon [dot] com