If your main goal is to extract webpages to htmls, then the process should be relatively simple. The most important thing that you will need is the proper website scraping software. You may have enough experience with html that you can extract webpages to htmls without having to use a program. But chances are, even if you are skilled enough to do this, you might want to use a website scraper just to save some time and tediousness. You can extract webpages to htmls by just copying the source code and making the proper edits to insure functionality, but a process like this could take days. A website scraper will do the job in 1% of that time.