Well actually this is the procedure:

1 - Make a new template with the nameservers ns1/ns2.fap2this.com
2 - Go to your registrar and create a host. If you have two different IPs to your disposal, enter each to ns1/ns2.fap2this.com. If you have only one, then enter the same for both ns1 and ns2.
3 - Enter your new nameservers for your domain.
4 - Add new domain in Kloxo, using the template as in 1)
5 - Wait until the domain propagates.

That's it!