I installed the 'markuphack' on my 6.0.2 ubbthreads coz I wanted control over the instant graemlins. I then went to install the 'quote with reply' hack and found that both hacks presume you are working with original code.
For example, step 7 of the 'quote with reply' hack says to edit ubbt.inc.php and to add code to a specific line. Since I had installed the 'markuphack', the code in question for step 7 no longer existed.
Just wanted to post a "head's up" on this one.
FC