First of all: Great Template.
I did have one customer running at 1154x 864 and that did mess up the layouts (pushed the categories sidebox below the footer and mangled the header). I have used a fixed 1000 pix width to cater for that.
It's a horrible res anyway and I think its just a Dell straight out the box.
I have a question about the checkout modules.
My customer wants the order breakdown on step 3 of the checkout process to be present in the step 2 of the checkout process so that online buyers can see what they are paying for before they have enter their card details.
I didn't think it mattered but he's quite firm on this point.
I did try editing the php modules but I don't really have enough experience of the flow to pick out the variables.
I have included images to help illustrate the point.
Regards
Dave