Usually when no pictures how it's one of the two following problems:
Wrong xampp, 1.7.2 needed.
Or your computer just has not got what it takes to run one.
That happened to my old computer.
Your problem is that you probably haven't set the image gallery correctly in hk, and that phpretro might've still use "habbo.co.uk" in some of the images. Go through your files and search for "habbo.co.uk" and replace it with .com instead.
Nope, but theres often in phpretro that it haven't been updated for the merge. So most phpretros out there haven't been updated so the images gallery goes to habbo.com for fetching the images. You need to open your php files in a text editor, and search for habbo.co.uk. (ctrl + f or you can use ctrl + h in notepad)