Does it make any sense for me to buy and install this?

I'm running XP SP3 on an Intel Celeron CPU 2.4 GHz w/1GB of RAM (maxed out) and a 40GB hard drive (Compaq Presario S4000NX box). I consider myself lucky to have completely skipped Vista and my computer is pretty darn stable these days, so would i just be opening a can of worms that doesn't need opening?

I probably plan to buy a new box within the next a year or so anyway.