Windows vista Progress Dialog Box for windows xp?

http://www.askvg.com/transform-windows-xp-into-windows-7-without-using-customization-pack/

guys in this web page they telling about how to change xp progress bar like vista but i have problem after done everytihng nothing happend also i dont uderstand the 404 thing plz explain to me i cant uderstand the

'After extracting the BMP file from it, add it at 404 location in file.'

this line?Windows vista Progress Dialog Box for windows xp?
I would definatly not recommend doing this if you're not sure what to do. if you follow the instructions closely you should be fine, just make sure you create a restore point before you try and change anything.