Oh god, I know this is a horribly old post, but I thought I'd put an update in instead of making a brand new post

I don't know any MAME/PC/PS1/PS2/DC/XBOX game that uses so many buttons.
what do you want to do with so many buttons?
Sorry for my stupid english.
I decided to wire the bottom black buttons to button 7&8 placement, instead of 1&2 like I originally intended. I also made buttons 7 and 8 black - updated pic coming.
Advantages:Tons. The 7th and 8 buttons double as:
L&R for SNES games
Turbo switches for TG16 games
Alternate button layouts for MAME games.
Disadvantages:Extra cost for extra buttons. That's about it.
This all happened by luck, of course. The buttons don't fall in place where I would normally rest my hand, so there's no room lost.
I would recommend utilizing all the buttons provided to you by the I-Pac. You won't regret it.
Odonadon