I get the feeling my issue is arising from a miscommunication in the help file.

There appear to be three major things to replace:
1. The filename itself (flatClone.php -> flatYourName.php)
2. the id tag in (one file? or both files?) renamed to... what?
3. _FLAT_ (24 instances) renamed to ... what?

more clarification - the help file doesn't distinguish if the FILENAME and the _FLAT_ should both be the same thing?
ie: if I make the file name be "flat2.php" should I also replace _FLAT_ with _FLAT2_? or _flat2_?