Do this so Kppp will show up.
Control Center, like start in windoze, then Configuration/Other/Menudrake. Click on the button 'Menu Style' then in the new window click a little dot for "All Applications" then click OK. Click the 'Save' button. Then see if Kppp shows up in the menu. The save may take a bit.
I don't know why Mandrake set it up this way. When you first install it you have "Administrator" applications and not the regular user stuff like internet and such. I ran around in circles with this for a while.
Hope this helps.