there are other shareware tools that can do the trick. also, code libraries. you can put notes and form data directly on top, which can mean small mods.
WARNED!!!
EDITING PDF TEXT IS A MIXED BAG. SMALL MODS CAN BE DONE, BUT PROBLEMS WITH WRAPPING TEXT ACROSS MULTIPLE LINES, ETC. OCCUR...
also, if the pdf is not encrypted, you can open it in NOTEPAD, locate the object definition, and manipulate the text natively.