@robert-hh hello robert, thanks for all the great help - it's really awesome!!
I managed to figure out, when booting in safe mode - that i can temporarily connect via ftp again (because the boot.py is bypassed).. and thus make changes to the boot.py.
soo.. the thing is though, that it seems the lopy does not care AT ALL about what I put into the boot.py script now, even after unplugging the short between G28 and 3v (which I assume should make it go back to loading boot and main).
EDIT
tinkering more about, it turned out I had to set the heartbeat to false in order to use the rgbled onboard the lopy. well done soren. anyway, it is indeed responding now, but setting up the thing with custom wlan configuration is really difficult. this topic has become pretty messy. I tried to change the topic name, but got a message that i couldn't.. it is pretty misleading atm. are there any admins on here?