Take a look at TTG Highslide Pro -
TTG Highslide Gallery Pro — The Turning Gate
It lets you build galleries with client proofing, shopping cart, etc all from Lightroom. Very easy, no html/css coding needed. It can either "publish" to a server (via FTP), or simply export to a folder on your computer. I would think you could then browse it locally 100% on the PC - but that would be easy to confirm with a free trial or a question posted to the site (the author is pretty responsive).
Mike
__________________
Pentax K100D, Sigma 70-300mm F4-5.6 Macro Super II, SMC Pentax-DA F3.5-5.6 18-55mm AL, SMC Pentax-M 1:2 50mm, Vivitar 1:2.8 MC Wide Angle 28mm, Pentax 540FGZ, Vivitar 285HV, Cactus wireless trigger and receivers
Flickr