How to add edited images to photo library?

VBSS is basically done, all i need is the pictures for it to look good on the site too.
i've taken a selection of photos on celestial bodies (as well as the usual "show the whole system" pic which i'll actually use as the cover photo like back when i started) and edited some text on them.
problem is, i can't get them to show up in the photo chooser menu. i've copied them over to the photo library folders (both "Images" and "Thumbnails" but even then they don't show up. can anybody help?