I can post the link but it won't help you at all. Unfortunately in your case you're out of luck. The 1.7F flasher will not allow you to flash a 1.B4 drive, and unfortunately there are no other suitable firmware updates which would work for your drive either.
Some of these OEM drives do come with a 1.B6 firmware on board, which would work for your drive, but unfortunately Binflash can't dump the firmware from these drives and without a valid 1.B6 dump or a normal 1.B6 firmware update (*.exe program) which isn't available either, you're basically completely out of luck.
Unfortunately OEM crossflashing such as 1.B4 to 1.7F is not currently possible for these drives. The firmware encryption these drives use, proved to be a very tough nut to crack, and without figuring that out it is just not possible to fully support these drives (such as full support for dumping, flashing and OEM crossflashing).