OK - here goes with the first daft question. I know nothing at all about PHP so it may be that it does things that I'm not familiar with ....
When setting up osCommerce it asked me to say where the secure server was (httpsdocs on my host). But at no time did it give me the opportunity to set anything up in httpsdocs and setup didn't put anything in there, it put everything in httpdocs.
In a file configure.php it gives the path to a folder called /catalog/ on the secure server but setup didn't create one. Should there be something in there or does PHP create files if/when necessary?
Secondary daft question - the path to the server is defined thus: