Well, first off I hope you didn't spend TOO much on your replacement screen...
And secondly you really shouldn't have bought a screen that wasn't exactly like the one you had.
Third, There is a good chance that this new screen will not work at all
and Fourth, You might as well send it to Apple and just pay the price since you've probably already dug yourself a hole as it is
So... good luck.

I don't think there's anyone who frequents this forum who knows how to replace mac laptop screens.