You can view KDE Help and UNIX® Man and Info pages directly in Konqueror, without having to start up KHelpCenter.
To view a KDE Help page, enter
/?branch=trunk5&language=en&application=kmail&path= to view the KMail documentation.)
into Konqueror's Location Toolbar window.
If you want to read UNIX® Man pages Konqueror makes it easy. For
#touch into the Location Toolbar to see the page for
the touch command.
To browse through UNIX® Info pages, entering
info:/dir takes you to Info's top level directory, then
it's just a matter of clicking on the right links to find the page you
want. Alternatively, use
info:/ to go straight to the Info page you want.
Unfortunately, KDE Help pages are stored in such a way that they cannot be viewed in other browsers. If you really need to do this your only recourse is to go online and visit http://docs.kde.org.