I'm really hoping for a solution here. I FINALLY made the jump from Windows to Linux and this is literally the only thing I need to be functional now

I'm trying to increase the speed of the scrolling within XnView MP. If I have a folder with 100 photos and I want to rearrange them - dragging a photo(thumbnail) from the bottom of the list to the top is so slow it's basically unusable.
Is there ANY way I can adjust this? Or is there a way I can "pick up" the photos and then scroll with the keyboard or something?
I'd be happy to pay $100 to get this fixed.
Thank you very much.