Yes, that link is for unrevoked, which won't work with hboot 1.02. The guide you want is
this one (couldn't link earlier as was on Tapatalk, which is a hassle for linking).
If it's 1.02 and S-Off I guess you have one of the rare ones that came S-Off all along. I'm not sure whether the hboot will let you fastboot flash a custom recovery - if it will then you can skip the revolutionary bit. Otherwise you'll need to follow that just to get the revolutionary hboot instead of the current one.
If you use 4Ext Touch recovery (link in that guide) you don't need to do the erase size check.
What I'd suggest is download the custom recovery (in step 2) and the rooting file (step 4b), and set up fastboot (following the guide linked in step 3). Then skip Revolutionary and try to install the recovery (step 6). If that works, you can then proceed to root as in step 7.
If installing the recovery fails, use the command "fastboot devices" to check that the phone is communicating with the fastboot program on your PC - if it returns the phone's serial number then that is working, if not then you need to get that going. If fastboot is working but you can't flash recovery then that would mean that the stock hboot doesn't support that fastboot command. In that case you will need to run Revolutionary anyway, which will install a custom hboot which does do this.