Right, I think I understand what you want to do, it should fit nicely. It would be a matter of moving the HTML elements to inside of that first "grid_10" div, and then making the widths compatible in the CSS.
For the images themselves, you would then put them in four "ul" elements, instead of two. Judging by what you've done so far, you should be fine managing that. It's quite an nice class and ID system you have. The only concern there might be is those images not slotting in correctly, if they don't then have a play with the widths and paddings.
The bottom 2 sections should move up once the Portfolio section is in that column, but be careful to clean up any stray spacer elements if it's not moving all the way up!
Edit: If you want a bit more info, just shout out. I was perhaps a bit rushed.
Last edited by Custard7A; 10-27-2012 at 12:12 PM..