> i've installed htrack 
> i can launch it from console 
> but how can i do it from kde? 

You can either:

- Install Khttrack (a KDE frontend) :
<http://www.nongnu.org/khttrack/>

or

- Install WebHTTrack (a WEB frontend) :
<http://www.httrack.com/page/2/en/index.html>