Matthias, I will on vacation in Aruba at the same time the Macna is on in September. And yes, I am still fighting with the WLAN connection.
SuperFudge,
What I am using is 6 wire modular line extension. It looks just like a regular telephone extension jack with a slightly wider wire but the difference is that it has 6 conductors as opposed to the two or three that telephones use for extensions. If you look at the clear jacks you can see this.