Here you can setup a Freenet6 account or change your existing account. This is different from your gogoNET account and is used in the gogoCLIENT to access the advanced Freenet6 services like static address or Home Access. Your Freenet6 account will also be your domain name, for example me.broker.freenet6.net.
You need to choose which Freenet6 server you want use and register on that server. If you want to use multiple servers you need to register on multiple servers.