its not hard to upgrade memory, cpu or drive.
the cpu is under the main panel (large), 4 screws, carefully remove the heat pipe n fan. i'm running t7300 2.0 gig cor 2 duo cpu. i think they also have a 2.2 gig version but dont know the id yet.
theres nothing else you really need to do.
the graphics card may let you down "sis mirage 3", its integratred so you cant do anything about it. i have just downloaded latest driver for it, go to sis downloads and use the gpu selection. it may not say mirage 3 etc but it does the job and doesnt slow the system down unlike the version fsc have on their site.