Hey all... i've searched long and hard, but... nuttin.../. i believe i've finally figured out how to mod the multiprocessor kernel ; ntkrnmp.exe. but i haven't seen anything saying how to use it, unattendedly. i'm using the bootcfg /a /raw /kernel=oemkrnl.exe /id 1 etc etc method for ntoskrnl.exe if i use the same method for the ntkrnlmp.exe, then i believe my comp will not boot up as it's locked into trying to use the ...mp.exe IF my hyperthreading is disabled. I think tbhis will hppn because the comp DOES crash when using a modded ntoskrnl.exe which works with hyperthreading is off, but does NOT while my hyperthreading is enabled. so in this method, i'd have to leave hyperthreading on if i were to use a modded ntkrnlmp.exe, i really do need to find a diferent way. Anyone know how? The only solution i can think of right now, is compressing, and REPLACING it with the old ntkrnlmp.ex_ in \i386\. i don't really like this method really, caused me my share of problems when i replaced the ntoskrnl.exe with the ORIGINAL in sp1a. [please do not change this into a debate about why in gods name i'd wanna switch hyperthreading off] cheers!