the submit.php and include/functions.php are the default ones edited for the ban mod.
You can upload the folder structure as is.
The /temp/words.txt should be writable (777) 
You add or remove words one per line in this fie.
The templates/banned_word.tpl is the error page shown when a banned word is used.
This tpl also shows the user what word is banned.

Please note that I have used a strict match in title and url IE the word must match exactly
In the description I have used a general match so that if you specify http then 
http http:// httprt will trigger the blocked submission. I did this since the majority of the spam
is in the description and I can think of no reason http should be in any word in a description.

If you have edited your php files open these up and look for //ban words mod and copy everything until 
// end ban words mod