boot screen changer for xp/vista/7

Hey I had to return to xp mce till I get my W7 ultimate signature edition in a few days and am wondering what is that program for changing your boot screen ?

I knwo it was a freeware and it was compatible with vista xp and w7 so I am gonna use it on my xp systems and once i return to w7 on my main system .......
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Sorry havent made any posts in a while I got burried in school and starting my own lan center / custyom build computer shop so I havent had time to do my normal posting and catching up........

IU am however back I got my collage scedual and work scedual to allow me 2 horus of messing around in between plus time for pro gamming WOOT MLGPRO FTW!!!!!

Do you mean the logon screen?
Perhaps this one?

Another alternative tool you can use is this one here - Windows 7 Logon Background Changer