Hddhackr only works with western digital drives so your already asking a question you know no one can answer.
The most helpful answer you will get is to buy a western digital, hack it and enjoy having loads more space on your Xbox 360.
As InsaneNutter said just download the latest: Xbox 360 Dashboard / System Update 2.0.16747.0 Download With Avatars, the Xbox 360 can not run unsigned code by default, so if anyone had tampered with the dashboard updates they simply would not work.
Update the consoles and enjoy, you can't...
You probably will get banned sooner or later depending on what you end up doing.
What firmware version is the PS3 on? if you have updated within the last few year you will not be able to jailbreak without a hardware flasher.