Homepage alignment for high resolution

[belvedere +]

When my website is seen on higher resolutions or wide screens, there is a big gap between the last picture and the third column. On normal resolution i.e. 1024x768 it's fine but I think people are now starting to use higher resolutions. Can this be adjusted automatically so that it's in the centre and there would then be an equal gap on either side?

However the perfect solution would be to fit an extra picture automatically when viewed from hi resolution otherwise just leave the 4.

Attached is a screen capture so that you can see what I mean.

Thanks