There is a Motown pattern on the Korg that has a great variation that suits "Pretty Woman", and I THINK it's the 3rd variation (C)
What you need is a snare drum hit on all four bets. That's the signature beat that you're missing.
For Brown Eyed Girl, you need to find an 8 beat that has a Bass drum hit on 1 and the "and" of 3. There's one in there somewhere ... I just forget what it's called.