Well its nice seeing you on here! LOL
To try and help you more on answering your question...
I know how comfortable things can get using photoshop. You get familiar with everything and just want to do it all in their. The good thing is you can design the front end of your website through PS. I would use that to just lay everything out exactly the way you want it. Then when your ready to publish it or make it live its a whole other thing. Yes, you can export things as slices and do something like this.
NOS PR but your results sometimes wont work right because of the different browsers out their.
I get away with doing a lot of things like this right from PS because it is quick and easy. All you have to do is create slices through out your design and then click file>save for web. Then once you save it you can choose to save both the html file along with all the individual images that it cuts out and pieces them all together with that html file. If you look at that
NOS PR that I showed you. Try right clicking and saving the image. As you can see it only gives you a slice thats because it was cut using PS. Very simple to do and a good way to start out and understand the basics of slicing.
I would start their and then start learning more about servers and hosting. FTP is another things to look into. It will allow you to upload your images to your server so other people can actually view it from a url. Once you start understanding that then I would try learning more about a dreamweaver, html, css. Those are the things that will help you to piece the website together and give you and your viewers across the internet what your looking for.
Another great and quick thing you can do right from PS. This is where I think PS is very powerful but kind of does everything for you. That is the Photo Web Gallery. It is a pretty impressive tool all you do is goto file>Automate>Photo Web Gallery. Go through the list of steps and it will actually create a gallery with full html and even flash files. This can export a whole portfolio of your images for a web gallery of your own. All you would have to do from there is link it up to a server. But you can preview it in a browser and play around with the files to get a better understanding of a website.
Hopefully some of this helps. Keep up the great work and dont forget to keep up with my
blog