MyGallery Plugin Question

I’m using the myGallery plugin to upload and display photo galleries and it works great. The only problem I am running into is that my blog design will only allow about 425-450 pixels for the bigger images after clicking on the thumbnails. I was just wondering if anyone was using this plugin and might know how I can alter the code so when you click the thumbnail it will redirect you to a seperate page to display the full image. This page will be made just for that purpose with keeping some of the blog design.

Or if anyone knows of any other plugins that might do what I am asking?

If you want to see what I have not and what I am looking for visit these links:

My current gallery displays:
Gallery

Looking for something like:
Gallery