More info ::
Because we have now 2 F/W contain logo.bin (2x5 / 1355 Chinese)
So you will get it with your own risk (ie logo.bin of 2x5serie + Boot.bin of Nuvi660 ==> Result ?!?!)

No one can ensure you that your 660 will be OK after falshing.

(1355 logo.bin can be used for 7x5 , 2x5 ., 14xx , 13xx., But for 660==> ????)