As far as broken laptop keyboards go... there's really usually only one option, and that is to replace them.
Now, depending on your model, they're usually quite easy to replace. It's a matter of getting the part, which can usually be found for about $20 - $40 on ebay.
I recently replaced a keyboard on a Compaq, and it was very easy to do.
If I recall correctly, it was 2 screws, a few tabs, and 2 - 4 more screws, and then a little connector under the keyboard.
Took me about 10 minutes to do. (I had a bit of experience with laptops and replacing parts before hand, so that helped, but all things considered, it was a pretty easy repair.
It's also useful to see if anyone has done it before, and can advise you as to the particular location of all the screws / tabs so that you can feel confident in what you're doing. I always look for a tutorial on things before doing them, and if I can't find one, then I ask around.
If you tell me the specific model of the computer, I can try and give you some more detailed instructions on how to replace the keyboard.