I did the same thing.

Apple has a recall on this part, so you can get a replacement for an improved version free and save yourself $149.99. Check out http://www.apple.com/support/macbook-bot...

The replacement keyboard I bought, although advertised for A1211 had no tabs on the sides and 6 locking across the top. The extra locking tabs in the corners made the corners of the keyboard bubble up. If someone wanted to saw bits of the top cover it might work. I ended up breaking of the 2 extra locking tabs, and holding the corners down with double-sided tape. I had to triple up the double sided tape in 1 on the two corners to hold down all the layers. Not a great solution, but it actually worked and looked clean, and the keyboard lights still worked fine afterwards.