BTW , i just add fbwf, ramdisk,wimfsf,all my drivers to the MSDN windows 7(of cources i have deal with the SYSTEM), with the system32 directory 400MB, it uses about 800MB memory so just several IE 8 pages will use all of the last memory .
I Have succeed to make a 400M windows 7 ram os for my netboork with 1G memory , audio,VGA,WIFI,aero, everything iworks OK, but the IME (I have not add the file cause i don't know the minium solution).