I could create a sitemap.html page with links to all the sections of my site; it's a bit boring if you have a big site to do this manually :O
I managed to add links from web pages to the sitemap.html page that I had made. The bit I found totally obscure was creating the xml feed for google.
How relieved I was to come across a brilliant piece of software which does the sitemap thing for me - this Brilliant Sitemap Software
The only thing left for me to do was to upload them to the website (including a couple of small images for the folders, etc) log in to my Google account and follow the instructions on how to get the sitemap spidered by Google.
What a relief! .... anyone can use this software (ok, not MAC users) - and it's brilliant! I highly recommend it. Click here for more information on thisBrilliant Sitemap Software