Two sites from the same Host

I have two web addresses with the same Host (and my ISP - Plus Net). I have been running one very successfully for a year now. All the pages I maintain on this site appear exactly the same if I link to the second web address.
I want to now split this second site away and use it to run a different website.
Had a quick look at the tutorial and could not find how to do this.
Can it be done and if so how?

Thanks.

Triagain Jim

sorry for being a little bit cheap, but how does this relate to smartftp? this is rather a (web-)server configuration issue, so maybe you should go to your isp's help forum?

Thought it maybe something to do with a sub folder on the address bar.

Over to Plus Net.................