Actually I succee to set the fusebit to
HighFuse: D9,
LowFuse: E9;
(I am not sure, but I can confirm while I at home)
I just want to change to external crystal to accurate the speed in 8MHz.
PS, 8L maximum speed is 8MHz.
Actually, I have 6Mhz, 8MHz, 12MHz and 16MHz. Also the 4Mhz and 20Mhz are shipping here.