How do you use a Steam serial #?

[Johnny B Good]

I pre-ordered this game through Frictional and they have provided me with a serial key for Steam... but I can't find anyway to actually use this serial on Steam, all I can figure is to buy it again or play the demo. Anyone know? Thanks a lot.

[Eek!]

Games>Activate a Product on Steam>Next>I Agree>Paste the serial>Next

:)

[Johnny B Good]

Thanks for the help Eek!