exm 128/internal memory and upgrading

Is the exm128 internal memory the biggest upgrade of internal memory u can get for the mpc2500, ive also heard people talking about upgrading the internal harddrive, does anyone have a DIY guide to do so?

help us out!

mem = biggest official - search this forum this has been discussed in the past.

the disk upgrade guide is in the user manual which you can download from Akaipro.com http site.