I have zen_lightbox 1.6.5 working ok with 1.5.5e. It needs to have the includes/classes/zen_lightbox folder added. There are three files in that. autoload_default.php, options.php, slimbox.php. It must come from some earlier version I had. Good luck.
Colorbox and lightbox are not the same. Lightbox is authored by Alex Clarke, colorbox is authored by niestudio. I've just done a file comparison of slimbox.php and jquery_colorbox.php and they're very different.
Thanks Cefyn,
Lightbox was mentioned in other threads as makes problems with newer versions of Zen Cart
and therefor I installed the Colorbox on 1.5.5 zen cart.
The colorbox worked well until something happened and caused it to make problems as mentioned before.
I do not know what was really the change that made the problem but I suspet that it happened after SSL installation.
ZC-1.5.5e, PHP 5.6.32, Database patch level 1.5.5 , IH 5, ZLB 1.6.5
The Next button does not appear on the main image.
The additional images have the appropriate next and prev buttons.
ie. The 1st Additional image has the next button. The 2nd additional image has the next and prev buttons.
The last additional image has the prev button.
Everything else is working fine.
any help would be appreciated
ZC-1.5.5e, PHP 5.6.32, Database patch level 1.5.5 , IH 5, ZLB 1.6.5
Everything is working fine now.
After several attempts of merging ZLB's includes/modules/additional.images.php with IH5's finally working correctly.