skyraker,
Have you solved your problem?
If you are using the SuSE 8.1 kde rpm's then I recommend that you install kdenetwork3-dialup-3.1.1-47.i586.rpm, assuming you are on kde 3.1.1. This is where kppp is located.
If not, please let us know what you are running when you post, i.e what versions, etc.