It should go something like this:
Settings -> Configure Konquerer
In the dialog box that opens you'll see a tree of options to the left, it should open on 'behaviour'.
In the behaviour box, there's a heading: Home URL:
type the URL of your desired homepage into the box - http://.......
Close the Configure Konquerer box.
Go to Settings -> Save View Profile "Web Browsing".
In the next dialogue box that opens it'll have 'web browsing' already highlighted. Click 'save'.