Page Layout ⇒ changing format within a table of contents

[famous_genius]

I am writing a book using the book class. In the table of contents, I want

PART 1 Whatever
Chapter 1 whatever
...
and then to switch, in the appendices to

APPENDICES
Appendix A Whatever
...


I cannot seem to get latex to recognize the \renewcommand to change from Part to blank and Chapter to Appendix. I can't seem to get rid of the ``PART" before APPENDICES without getting rid of it on all the other sections, or to change ``Chapter" to "Appendix"

I would also like to delete the page numbers on pages 1 9 and 15. I have tried placing \thispagestyle{empty} in various places in the document, but to no avail.



Here is my code:

\documentclass[11pt]{book}
\usepackage[toc,page]{appendix}
\usepackage{tocloft}
\begin{document}
\renewcommand{\cftpartfont}{\bfseries}
\renewcommand{\cftpartpagefont}{\bfseries}
\renewcommand{\cftpartpresnum}{PART~}
\renewcommand{\cftpartaftersnum}{:}
\renewcommand{\cftpartnumwidth}{6em}

\renewcommand{\cftchapfont}{\bfseries}
\renewcommand{\cftchappagefont}{\bfseries}
\renewcommand{\cftchappresnum}{Chapter~}
\renewcommand{\cftchapaftersnum}{:}
\renewcommand{\cftchapnumwidth}{6em}



\frontmatter
\thispagestyle{empty}
\setcounter{tocdepth}{1}
\tableofcontents

\mainmatter
\renewcommand\partname{PART}
\part{Theory of Junk}
\input{Ch1}
\input{Ch2}
\input{Ch3}

\part{Theory of Garbage}
\input{Ch4}
\input{Ch5}


\renewcommand\partname{}
\renewcommand\thepart{\null}
\renewcommand{\cftpartpresnum}{}

\part{APPENDICES}
\appendix
\renewcommand{\cftchappresnum}{Appendix~}
\input{A1}
\input{A2}


\backmatter
\end{document}