Set normal account to play games...

Hi, My windows vista has one user account and one admin account, i've
reccently installed the game 'audition' which is known as an 'unidentified
program from an unidentified publisher' to play in both accounts but this
game is always block or rather requires a permission to 'allow' the program
to be run or requests for the adminstrators permission to run the program,
and there is a popup window telling me that i change to control settings
about allowing the game to run without prompting anymore in the future at
'user account controls' but i just can't seem to find the place to chnage the
settings, can anyone please help me with this problem? thanks