The only game I have in mind is the Mario Kart Wii - but is this game playable using a normal Logitec gamepad (without analog control)?
Probably not, since on the Wii you have the option to play with a Gamecube Controller, a Classic Controller or the Wiimote+Nunchuck combination and all three of them use the analogue sticks to steer.
There's also the possibility to play with the Wiimote alone, but that uses the motion controls to steer, not the D-Pad.
I really love Dolphin (except that it does not support N64...
and why should it? it's not a N64 emulator. mupen64 plus runs great btw.
if you don't care for the command line version, there's a very good front-end from SpeedofMac, check the emulation forum.