HELP replacting a cv boot 93 sunbird

I am trying to replace the inner cv boot on my 93 pontiac sunbird. I have the rotor and hub off, but I do not know how the shaft comes off. I have looked all over the internet for info, pictures ect and can not seem to find any information. Is there anyone out there that has done this, or can give me some advise on how to get the shaft off.

Thanks, Julie