well, tried putting an "echo bye bye" in a /usr/lib/pm-utils/power.d/ script and it seems they're not executed (i can't find any "bye bye" in pm-powersave.log). But pm-powersave.log tells they are.
May be there is something wrong in the "echo" of the pm-powersave function. I think it must tell me what are the blacklisted hooks. I can only see them in pm-suspend.log:
Initial commandline parameters:
Blacklisting laptop-mode.
Blacklisting hal-cd-polling.
Blacklisting intel-audio-powersave.
Blacklisting journal-commit.
Blacklisting pcie_aspm.
Blacklisting readahead.
Blacklisting sata_alpm.
Blacklisting sched-powersave.
Blacklisting wireless.
Blacklisting xfs_buffer.

I may be wrong here but are you sure that hooks are actually run. Here is a relevant piece of /usr/lib/pm-utils/pm-functions;
_run_hook() {
# $1 = hook to run
# rest of args passed to hook unchanged.
log "Running hook $*:"
hook_ok "$1" && "$@"
log ""
log -n "$*: "
hook_exit_status $? && LAST_HOOK="${1##*/}" || inhibit
}
For a disabled hook, hook_ok() returns 252 instead of 0, so "$@"=$hook $parameters is avoided. However, a log entry is till made. You can check this by replacing "$@" with (logger "abc" "$@") and see if "abc" appears in /var/log/messages.

Yes they're not executed in fact...so, sorry for the stupid report.
I'd only like to see my blacklisted hooks in pm-powersave.log too, that now aren't shown.
By the way, really thanks for the support.