For converting a Photoshop design to a HTML/CSS you have a couple options.
First, there are any number of slicing services. psd2html.com etc. These are legion and they typically charge per page.
Second, there is a plugin for Photoshop called SiteGrinder that can do that. It does a respectable job.
Third, you can learn to code it yourself. This is the usual recommended method, but if in a hurry you might want to check out one of the first two options.