Macbook hard drive help

[pitchfork]

Anyone know if it's okay to change the hard disk in a macbook, just bought a cheap 13" macbook for portability but when recording with it I get some problems with the throughput because the hard disk is so slow.
I don't really want to buy an external drive because that defeats the object of portability, so if i bought an installed a decent laptop drive would the mac spit it's dummy out?

 

[pitchfork]

It's used mainly for logic and various other audio apps.
As I say i only bought it for portability, i got a pro and a rock laptop which are fine but weigh a lot compared to this lil thing. So I don't really want to have a big external drive to carry around too.

So if I put non mac hardware into it, it'll be fine, because i've heard that mac osx must be run on the right hardware.

 

[pitchfork]

I'm actually experiencing problems with recording due to hard disk speed on my macbook.
Hence, it needs a new drive.
First thing I did was put 4 gigs of ram in it.

Thanks for your help though anyway guys, much appreciated.