[JaTochNietDan]

If you want a fully static IP address, only your Internet Service Provider can offer you one, there are alternative methods on the internet that use a domain based re-direction service to your new IP when it changes, however the SA-MP client does not resolve domains everytime it is opened, so people will still need to re-add the domain when your IP changes.

If you really want a static IP, contact your Internet Service Provider, most providers will give you a static IP either for a fee, or for free.