Hi
You will need both hardware & OS that runs on 64bits architecture... but Core2Duo is 64bits...
In a full PI (ABAP + Java) you'll need around 100-130 Gb
~10 Gb OS
~20 Gb swap
~20 Gb binaries
~80 Gb Database
I'm afraid problem will be more on the memory side, I'm not sure it can run with a machine with less than 6Gb.
Regards