Gotta say it.. THANK YOU !!
I just installed an AVIC F700bt in my 95 Lexus this past weekend and it had the original firmware in it (1.00101 or something). The load times were atrocious, and half the button presses didn't even register.. the lag was UNREAL. I don't know how Pioneer could release such garbage.
After following the simple steps in this thread, and using the supplied files, I had the update up and flyin in no time (well, maybe 30 minutes). Load time is still sub par compared to factory units, but the button presses are crisp and fast, the system sounds are way cleane