If you insist. There is a program called PS Check from AMD. It can be used to alter the P states of the CPU (power/frequency states). You could use it to cut down the second core of each module (four cores of a CPU are organized like this: Core 0, Core 1, Core 2, Core 3; You'd be cutting down Core 1 and Core 3's P states) and boost the first core significantly. It probably wouldn't be able to quite match the mobile Intel i3/i5 CPUs, but it would be plenty powerful enough for some decent gaming. This would give it a good boost in games except BF 3 MP. If the laptop also has BIOS control of settings such as the BLCK and the memory frequency (unlikely, but possible), then you could do a little more with some minor overclocking.
However, like I said, this is advanced. If you're sure that you want to do it, then you know what laptop to buy and you now know what you'd need to do to work with it properly. If you need help on using the program, then there are probably some online tutorials that you could follow and/or you could come back to the Tom's forums for more help.