It's ok, I found the answer myself-I removed the "both" from the wrap comment and it stops at the last frame :)

Change this:

$(".slider-holder ul").jcarousel({ scroll: 1, wrap:"both", auto: 4, start: 1, itemFirstInCallback: mycarousel_itemFirstInCallback, initCallback: mycarousel_initCallback, // This tells jCarousel NOT to autobuild prev/next buttons buttonNextHTML: null, buttonPrevHTML: null });

To this:

$(".slider-holder ul").jcarousel({ scroll: 1, wrap:"", auto: 4, start: 1, itemFirstInCallback: mycarousel_itemFirstInCallback, initCallback: mycarousel_initCallback, // This tells jCarousel NOT to autobuild prev/next buttons buttonNextHTML: null, buttonPrevHTML: null });