That alters the boot.ini which adds another section after fast detect iirc multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /fastdetect
I tried this once however it started hanging system something to do with USB devices.
IPlural this is not same as LogonStudio, Bootxp loads just as OS starts as the image needs to be 256 and 640x480?
Which really i dont think its wise to use this as i found stability problems with it the fact it points to another NTOSKRNL after fastdetect created problems for me.
As someone really not knowing what to do with this might cause their OS not to boot