I'm developing a section of a website for photographers (with registered user class) to post their work

Rough work in progress can be found here:
http://www.thepittsburghscene.com/pages/Photos/activeview/PhotoList/albumview/ypu6CPzg7064jqHCABeViw/?iwm=Photos

I'm using the Photo gallery web part in conjunction with the jquery masonry plugin to give it the tiled look. I'd actually like to extend the width of the thumbnails further, but since they are stored as 144px, as we continue to stretch the image, it becomes increasingly pixelated, which sort of defeats the purpose.

I was wondering if it's possible to change this default of 144px (or it seems to be 142 here: http://monox.mono-software.com/MonoX/Pages/SocialNetworking/PhotoGallery.aspx  - this is also pixelating the image)

By switching it to something like 250px or 300px, then shrinking the image down to a smaller container (rather than the reverse, which is happening now), I think it'd look very crisp and more enticing to click on

Any help would be appreciated!

Thanks,
Craig