Re: New Custom Gamecube Regulator! Updated!!! GC Power Draw!!!
With a multimeter. You do have a multimeter that measures resistance, right? If not, get one. A multimeter is an essential tool, you can get a decent one on sale for less than $20.
And I don't think it works with capacitors, sorry! It should be a lot easier to find 110uF capacitors, though.
EDIT: Looking at the datasheet, it seems 100uF capacitors should work just fine instead of 110uF ones. 100uF is the minimum value; it seems you can use anything over 100uF. Using, say, a 4700uF capacitor would be a bit excessive, though.