Trouble Fitting Layout

Im working using GIMP to create a theme for my blog. Im planning on doing the design work and having a CSS slicer turn it into HTML for me since the last time I tried that it took me forever. Anyway, I have the 1024×768 layout for my home and everything fits. Now Im creating the layout for the single page and its being a pain. Obviously once the page is sliced it wont be a problem since the footer will display below everything but for now Im having trouble fitting a small pic, some dummy text, comment boxes and comment displays. I want to keep it to one page so that the slicer can understand the layout. Any tips on what I should do?