Hi,
I was having the same problem, and was already using the PowerStore grid, but it was still too big for the content size that I had. The PowerStore grid shows 8 images across, and they were getting cut off.
I read all the posts here, and was concerned about the issue of resizing all the thumbnail images, which really wouldn't be convienent when you are adding images all the time.
So, I went in to the gallery's javascript file, gallery.js, and found, right at the top:
options: {
initial: 0,
perPage: 8
},
I changed that to...
options: {
initial: 0,
perPage: 6
},
...and everything worked perfectly!!! No tweaks to CSS, one simple change!
Hope that helps others.