[Q] How to Resize /dev partition for increasing /data and /system ?

Hi guys I just started deving for android and found that the /dev partiiton is mainly used for ota updates now my device (Galaxy Fit gt-s5670) has been discontinued and its 260 mb space wasted so was wondering how i could resize it to say 5mb and divide the rest to /data and / system partition ?

I want to know if this is feasable and a way to do it.Thanks a lot.