Suggestion. The front page of your web site is like an advertisement. Decide long and hard how you want to convey your message which is that this is a photo restoration/editing site.
Your cover/home page is extremely important. This is the sell. This is what will hook your customers in. You need it to look good. You only get one chance to make a good first impression. If you screw up, your potential customers will move to someone else. I'd suggest a nice clean web site with a picture of photo that's halved showing on the home page. Half of the photo will show the bad and discolored photo and the other half will show the edited photo. consider an angled line and not just a straight down line that separates the two halves of the photo.
Move the photo browser to a separate page. Keep your photo browser arrows that showcase the photos static as well. Consider changing the logo type and the arrows of the photo browser.
Please do not crop photos differently between edited and unedited versions. The edited photo of the girl holding the picture frame is jarring because the subject jumps back and forth between mouseovers. The same with completely editing the background from the subject as is the case with the photo of the car in an urban graffiti setting and suburban setting. Try to keep the subject the same or in as similar a position as possible.
You need to keep in mind most computers, home and business, use lower resolution monitors and build your web site with something like 1024x768 (or similar resolution) in mind. Firefox also doesn't seem to display the page properly, at least not on the computer I use at work.
Standardize the navigation method on your web site. While it's probably old and tired, using a navigation bar that is on the left side works very well but shrink down the navigation links/icons. Make it as small as possible while still being legible and easy to use. An alternative is throwing the navigation bar across the top with your banner and the navigation links.
Consider using a WYSIWYG html editor if your html skills are not up to stuff. There are a few free ones out there, do a google search. Try to stay away from Flash as that slows your site down. Subscribe to KISS (keep it simple stupid). You want to convey professionalism, not some kid who decided to cram every single web effect known to man on his web page.