Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
You can find the FPDF classes in the folders fpdi and fpdf-tpl (this are LGPL packages from FPDF).
If you need the TCPDF class, please check into the pdf folder.