I have never really looked into it before, however my friend gave me a really nice little website that basically allows you to specify more 'friedly; urls.
All you have to do is specify each .html page that you have, then specify the 'friendly url', after this has been completed it generates a .htaccess file which you simply upload to the public web directory of your server (if you host allows .htaccess files)
Sometimes you have to just make a folder within your top level domain (cars) and it will work as an extension
You kinda sorta have to experiment with it to see if either would work for you.
I built my youngest daughter an internet radio station site and used it like that until I purchased her a domain for it. She was 14 when I built her site and when I found out she was serious about it then I bought her domain and a hosting package. Now I work 10 jobs just to pay for her Shoutcast internet radio station lol