Increase ram??Always a good and cheap way to increase overall sytem performance.You can never have enough ram.. that,s my opinion anyway...Remember that your hdd access time as well as running speed 7200 or more is better than the old 5200 rpm.Like katja says terminate as much tsr,s(terminate stay resident)as you possibly can..They eat a lot of memory..Also check your cmos to see if you can possibly adjust the fsb to the 333 at least or 400 if possible.Sometimes your default setting in the cmos is set to auto which will adapt the lowest balanced fsb speed..

So in short yes I think more rram would bebefit you definitely!!