No APM with Pentium4 HT ("multiprocessor") possible at all?

Because I have a lot of critical hardware like Audigy, DVB card and so
on I usually configure my Windows XP Prof PC as "Standard PC" and not
the usual ACPI, by pressing F6 during the setup procedure.

Now I upgraded from a normal prfectly working i845/Pentium4 System to
a brand new i875p/Pentium4 2.4c with Hyper Threading.
I installed Windows XP Prof totally new, and like a thousand times
before, pushed F6 in order to install Windows without ACPI.
But now my PC does not shut down automatically, because there is no
"APM" register in the energy options, where I normally can activate
it! I have read the forums and found the hint to manually install the
"NT APM layer" (or whatever it is called in English: I am a German
User) afterwards by going into device manager und using the new
hardware wizard and add the "NT APM ...". I did that, restartet, but
in device manager the "NT APM" is now signed with an exclamation mark,
which means not working. And it really does not work, when I shut down
windows only the "you can now turn off" screen appears and I have to
manually turn it off by pushing the power button.

As you see, I tried everything, what is mentioned in the newsgroups.

Now I have read that APM does not work with multi processor systems
(what the Pentium's with Hyper Threading are in a way), is that
right????

Does that mean, that it is really not possible at all to use APM with
any of the new Pentium4 (except turning off the HT in bios)?
Which would mean that I am forced to use ACPI in order to make my
Windows shut down automatically?
But I don't want to use ACPI because I only had trouble with it!

Or is APM possible with multiprocessor and am I just doing anything
wrong??

Thanx in advance, Torsten