[NTG-context] How to make a PDF workbook structure with index?

Hi everybody, is anyone experienced in archiving PDF? I need archiving lots of different PDFs in different sizes and formats into workbooks or folders with index files. How could I possibly look into each PDF, getting the title info and generate an index? How do I do clickable references to each content PDF? How could I practically bind PDF together (ZIP, tar, ...)? Is there some sort of workbook-like file-format? I had problems with re-arranging oddly generated PDFs via pdftex so I want avoiding re-arrangement. Thanks much for any hint. Thomas Schrader