The reason it may be underclocked is because the CPU is running at 5.5 X 133, which is not quite 750. 5Mhz or even 10 - 20Mhz you will never notice the difference.
Also CPU FSB and CPUCOOL are the same thing, CPUCOOL is a whole suite and CPUFSB is just one part of CPUCOOL.
I say its not worth it, and I would not want a risk any harm to a nice laptop.