I modified my files exactly like the instructions say and it doesn´t even work, when I try to access my forums there's an error in the ubb_lib.cgi file, you should try to make write the instructions in an better way, you don't take care of other hacks aleady instaled in the files, and you should only write what to add and not to replace a large amount of data that is the same in both files getting rid of other hacks. Sorry about my english, is my second language.
Pinche hack feo, nisiquiera sirve!