Argh, this guy still has it online.? I talked to him many times but he refuses to take it down. Beside he is using it totally wrong and the result he showed was more an "accident" then a followme.
This is an old version where I experimented with FollowMe. This is never going to work because its conceptually a wrong approach. Nothing a bit of coding can solve.
It has two parts: VPS and vGPS. On short distance the vGPS/compass part just isn't accurate enough, on longer distances the VPS accuracy is too low.
In the end it doesn't work reliably for any distance.
I think Raul continued with some experiments but the function is no longer publicly available.