Time ago i asked Creamware support why SFP crash using P4 in Hyper-Threading mode and what to do as a workaround. I wrote them i resolved using SFP 3.1a, but they told me to disable HT in mainboard. Also respond about SFP4!! This is the mail from cw support (yes! it's *so* small!!)
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Hi,
you need to disable hyperthreading if your mainboard support it.
SFP 4 will be next year.
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...it seems @ cw are very busy

i hope for the SFP4!
Sincerely,
DudeZ