[texhax] How to add book parts names in table of contents?

[M. Fioretti]

Hello,

I have a book which is divided in several parts:

Part 1: general

	Chapter 1: title of chapter 1
	Chapter 2: " "  "  "  "    2
        ...
	Chapter 8: " "  "  "  "    8

Part 2: something else

	Chapter 9: title of chapter 9
	...
        Chapter 15: title of chapter 15

Part 3: another part
	Chapter 16: title of chapter 16

etc etc...

How can I add the "Part N" numbers and titles in the right places in
the initial Table of Contents? I don't need them to appear _between
chapters, only in the ToC. Is it possible? How?

Thanks,
	Marco