Which PC1066 can i use with the P4T533-C?

I´ve seen on Asus homepage that some PC1066 is not suitable
with this board.
this is the list that´s on the RIMM´s that are tested and qualified
by them.

1, Can i use others RIMMS than these below??

Kingston 1066 128MB nonECC 4d ASU1066X16-4/128MB
Samsung 1066 256MB ECC 8d MD18R1628AF1-CN9
Samsung 1066 128MB ECC 4d MD18R1624AF1-CN9

2, How big is the difference between PC800 and PC1066??

any 184 pin mem.

im using kingston 1066-32 ECC modules (ecc isnt supported so i just run it without) and mushkin 1066-32 modules.