Default [Q] Repartition memory layout for Xperia Arc (4.4.x)

I see almost rom 4.4 for my Xperia Arc have been repartition memory layout , as below picture ( copy and paste to your browser's address, newbie cannot post link)

/data: 470MB
/system: 450MB

Can anyone change to
/data: 570MB

It's quite waste memory while still have not enough memory to run Art runtime.

p/s: i'm using Pac-rom 4.4.4