First you would create a text document, in notepad for example, with the below code in it:
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>http://www.example.com/test1</loc>
</url>
<url>
<loc>http://www.example.com/test2</loc>
</url>
<url>
<loc>http://www.example.com/test3</loc>
</url>
</urlset>
You would replace example.com/test1 with your own domain name and folder or file locations (ie: yourdomainname.co.uk/location). You can include as many or as little <url></url> sets as you need and there are other details but this is the simplest form of creating a sitemap yourself. Once you get this done save the file as a .xml file (ie:sitemap.xml) and upload it via FTP or File Manager. Different FTP clients do this in different ways but in file manager you would double click "public" on the left and then click "browse", find and open the file and click "upload".
The rest is done on google's webmaster tools but the instructions I've found on their site are: on the Webmaster Tools home page, click the site you want. Under Site configuration, click Sitemaps. In the text box, complete the path to your Sitemap (for example, if your Sitemap is at http://www.example.com/sitemap.xml, type sitemap.xml). Click Submit Sitemap.
And you're done.
If you would prefer to avoid the coding and creation of the actual sitemap file there are a few sites that will handle this for you. I don't know which are any more or less reputable but the first one I found was www.xml-sitemaps.com. Just run a google search for "create a google sitemap" and a few options should show up. This should generate the actual file, then just upload it via file manager or ftp as mentioned above and follow the rest of the steps as if you had created the file yourself.
Hope this helps.
