lost soul, i hv an idea... usually when u download trial version of screensavers and u apply the Legit serial. the SCR file itself is "changed". u can then just copy the scr in your windows system32 and copy to another pc and it wont ask for the serial. (pls make sure u r doing this legally) some screensavers have a "smart" check system... it checks back at its homepage to see if u are using a pirated serial. if it does, it will do very bad things to your screensaver file.