Replace VZ Rear Wheel Bearing [calais]

[supercellkid]

Hi All I've searched around and had no luck in finding a thread that has a "How to" on changing the rear wheel bearings on a VZ commodore / Calais etc. I have recently had a squeaking sound coming from my rear left wheel. It sounds like bearings as the sound is always there at all speeds, brakes or no brakes. I have successfully changed Front wheel bearings on some older RWD Cars. I suspect this will be nothing like the old front bearings I've done huh? lol. Do I need to replace the whole Hub assembly just for the bearings? I noticed these hub assembly's are expensive. Would I need special tools? Would I need a press? I have only basic tools. PLEASE HELP!!!! I realy cant afford a mechanic right now so any tips would be most appreciated.