If you need to download entire website and converter web to chm, use the Web2EBook. It can download entire website or download web pages, convert htm to chm or htm to text .It is a powerful chm maker, convert web to chm. Web2EBook is a web spider. It provides accurate analysis of web content and penty interactive interface to select which htm pages to download, also you can specify which kind of resource to download.
Отличная программа для загрузки Web сайтов, и сохранения их в файлы справки Windows. Также программа может использоваться для конвертирования chm файлов в htm или text файлы и наоборот.

Web2EBook is also an offline browser and view download web pages in it after download website.
How to use Web2EBook(It's very easy to download website)
First start a new download task, input downolad website URL, the task wizard allows you to quickly specify the website download settings(default settings are enough).
Then just click button start and wait for the task complete.
After download website finished, you can watch the chm directly .You can also copy the txt to mobile device or sony PlayStation Portable(PSP) . Beside, you can view downloaded web pages in Web2EBook.