Convert two old websites to new design.

I have already had one of my websites redesigned, I would now like my other two sites updated to have the same look and format. The new design is [login to view URL] The old designs are [login to view URL] and [login to view URL] There are a few minor changes I need on the [login to view URL] site I would like done first before changing the other two to the same design. I need new checkout buttons on the products page and I need one of the logos on the right hand side of the home page made a little bit smaller. I would like it to be designed in a universal type program that will allow easy changes/modifications in the future. No pre-made templates please. It needs to be designed for IE6, Safari, Chrome and Firefox please. I will need someone who can commit to being availalbe to make some minor changes in the future such as updating new testimonials and new audio and or video.