Check out E-Bay....You'll find out the price of a known working laptop mother-board, with a faster CPU than the I-Opener, is expensive....probably $200 or more.
Next you'll have the near-impossible task of fitting it into the I-Opener case, rigging up a power supply, then making a controller for the screen. I think if you add up all the problems you're likely to have, you'll figure out this is a project costly and very difficult.
Easiest solution....accept the I-Opener for what it is, do the mods already tried and proven to work, buy a newer laptop for your gaming.