i have been researching this too.
to my best knowledge, all celeron M's are 400mhz FSB.
and others have indicated that Centrino 400Mhz FSB chips don't do PAE.
so my guess is that Celeron M's would not do PAE and would not reboot on 10.4.3 install
that said, somone on the wiki got it working so it is quite confusing.
http://wiki.osx86project.org/wiki/index.php/HCL_10.4.3i am prob gonna buy the widescreen $350 laptop tommorow at office depot and so am wresting with this myself. upgrade the Celeron 360 to a Centrino 740 (i've read on intel's site Centrinos > 740 are 533Mhz FSB ). also wireless is never gonna work witht eh intel pro 2200b...fyi