> i've ripped a whole site ( 450 mb) but when i open it 
> (several 'index' files in several folders) and click a 
link,
> my browser always wants to connect to internet instead of 
> linking to the ripped files on my pc

Probably becaue of "external" files not caught by httrack.

> how can i fix this (perhaps it's a really stupid question 
> but i would appreciate it if you answer it ;-))

"Set Options"/"Links"/"Get non-html files related to a link"

and then quickly recrawl the site using "Continue an 
interrupted mirror" (NOT "Update..")