IMHO;
the absolute easiest way to create a sub web is to make a folder in your
local web structure, then right click it and select "convert to web (or site
in fp 03)", then open it, do what you need to do for your pages or whatever,
then in FrontPage hit file/ publish web (or site in fp 03). in the publish
destination dialog box put the name of the subweb at the end of the
destination like somesite.com/newsubweb. by doing this FrontPage will
create the subweb during your publish function.
HTH
--
Chris Leeds,
Microsoft MVP-FrontPage
ContentSeed: great tool for web masters,
a fantastic convenience for site owners.
http://contentseed.com/