Web scraping / Crawling software

I need a website copier. I DO NOT want you to copy the existing code available. I need my own (this will be verified). I need something like HTTrack with the following: Features: 1. [login to view URL] 2. Download and index (properly) whole and partial websites. 3. Single and multiple sites 4. Automatic checking of sites downloaded for updates / deletions / new additions / changes, etc.... 5. Ability to easily delete unwanted files, directories downloaded. 6. Fast download speed. 7. Auto downloading and re-indexing (replacing of existing files) for updates. Verification of local site index. 8. Copies and indexes videos 9. Copies and indexes zip files, pdf, word and excel and the like 10. Download all links option 11. Compatibility with all major engines to include IE, Safari, Chrome, Firefox 12. Must be able to pass 13. Must have a useable GUI for all functions with a map to functionality should a re-design of GUI be needed. 14. Keep accurate notes in English about where important components are, functions, structure, etc... ** NO embedded backdoors, viruses, worms, or the like. Clean code, clean functionality, well thought out. Will be backtested and inspected prior to release of funds. Within your bid, the number must include 2 months bug fixes. Windows2000/XP/Vista and Mac Os This is to be used ultimately as an offline reference material. It must be easily searched using embedded tags, keywords or by site name. It must be able to be further refined using body text and/or headlines. Also be able to be searched by web text, type of document (word, excel, pdf, etc...), video, etc...