301 Redirect using .htaccess

I am currently redesigning a site for http://www.avocado.org/

the new site will have new SEO friendly urls. The old site, has over 3,660 pages indexed in google. I want to 301 redirect them to the new pages. Do you think i should do global redirect for all of them at the same time?
for instance: if someone clicked on the old url it will go to new INDEX (Home page)

ErrorDocument 404 /index.html

or

should I do following for all 3600 pages?

redirect 301 /old_file1.html http://www.domain.com/new-file1.html
redirect 301 /old_file2.html http://www.domain.com/new-file2.html
.
.
.
redirect 301 /old_file3660.html http://www.domain.com/new-file3660.html

Thanks

 

I accidently made 2 posts, please erase one of them!

 

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^shop/(.*)\_(.*)\.html$ http://www.domain.com/$1-$2.html [R=301,L]

Click at the other one to report it.

 

so what this code would do?

Options +Indexes
Options +FollowSymlinks
RewriteEngine on
RewriteBase /
RewriteRule ^shop/(.*)\_(.*)\.html$ http://www.domain.com/$1-$2.html [R=301,L]

Thanks

 

Redirect from the old to new URLs.