just personal preference i would have done something different with the color scheme its a little bland.
on another note some of the information is displayed a little off in IE explample contact page
THE HOME OF: 'Gipsy' & 'Classic' Caravans and The 'Motorhome & RV Centre' - 7 Oxford Street, LEVIN, New Zealand - Phone: 64 6 368 5548 OR Fax: 64 6 367 5223
and then the address again but the layers are begining to over lap just a bit a and on the other pages the information after Phone: gets cut off.
and on the parts and accessories page some of the pages have missing images so you get that ugly box with a red x. I would recommend either not having an image or puting in an image with words saying image not available for this product.
I can tell the site was designed by the programmer. You not only put Admin as a link in the primary navigation, but it's the first option. And Home is the last option! People "read" the site in a Z patter, top left, top right, lower left, lower right. The web site is for marketing to your buying audience. They don't care about Admin. Hide it somewhere or make the administrator type in the word Admin after the URL.
I would also put Contact at the end of the list, only in that it is usually the last call to action.
And personally I try to avoid links in the body if they are also available in the primary navigation. You mix the links up so some open pop-ups and some go to a primary navigation page