How to get website offline
 

I want to view a whole website offline. Not just the home page of it, the whole site so that I can click on the links as well, and view it at the time I had ripped it (doesn't have to be up-to-date offline). How can I do this? I knew how to do this with Internet Explorer but Firefox doesn't have this option in Bookmarks.

Well, you'll have to go down to the terminal to do this the fastest way. Look the man page for utility called wget. In short, this is how I'd mirror a web site:

wget -m -k http://www.slackware.com

Instead of -m you can use -r -l N, where N is your depth level.

Can I view the saved pages on Firefox like a website if I were online?

If it's a dynamic website make sure you use that option to set the depth..

I once pulled a dynamic site that had a calendar on it.. so if you can tell me when a calendar ends I'll tell you how deep this thing was trying to drill... ugh

I'm trying to download a DVD store website so I can look at their products offline. How would I go about doing this?

Yup. -k options does just that - it converts (konverts :) ) links so you'll never go for a online link instead of local one.

I've been using HTTrack to rip this site.
Where does wget save the pages to?

If I only want to save a specific part of a website, like all the sites but not everything else in the home page, like www.blahblah.com/onlythis, how can I do that? I think ripping the whole site might take up too much space and time

wget -m -k -np http://www.blahblah.com/onlythis

-np stands for no-parent.