Suppose you wish to have A to Z links on your pages which lead to a list of images starting with that letter. You can do this by constructing search links, like this:

 <a href = "search.php?action=filter&filled=1&whichtype=links&titlecondition=start&titlesearch=A" >A</a> 

For the letter B, just change titlesearch=A">A to titlesearch=B">B. To restrict to the current category, tack on &incatid={CATID}.

Remember that custom templates can be applied to any page, so you can make a special search result template and use it by tacking &custom=yes&TID=specialtemplate onto the search URL.