The "Freeola Customer Forum" forum, which includes Retro Game Reviews, has been archived and is now read-only. You cannot post here or create a new thread or review on this forum.
If it is InstantPro then I don't think you can change the thumbnail size - I could be wrong though!
FYI The Freeola Gallery documentation is here.
As the Gallery is designed to open a larger image via a 'lightbox' I don't think you can add another link as well.
If the built in Gallery thumbnails aren't right for you then you could just create a page(s) with images the size you want and have them linking to another page with a larger image and more content etc. That would solve both your problems :¬)
[s]Hmmm...[/s]
My Freeola InstantPro Site