Similar questions have been asked before it is best to search explore the forum and FAQ's before posting if it is shareware the serial would most likely have to be entered at the end of the trial period to keep using it
read this thread http://www.oldversion.com/talk/index.php?a...t=ST&f=5&t=1666 in it there is an offer from TheBulbasaurfreak that you cant refuse ;)
plus in this one are tips from about installing older version shareware http://www.oldversion.com/talk/index.php?a...t=ST&f=2&t=1757 & tell your friends what you learn :)