Things you will need and to do
-A memory card (preferable a spare one), and also preferable smaller that 2GB
-Backup all the info on the memory card, we will be formatting it!
Section 1 - Creating a Goldcard on a working phone
Step 1) Get memory card CID and goldcard image...
Didn't see a guide here to root the HTC desire s, but there are plenty out there.
Here is a guide I wrote to get it done in excessive layman terms.
Section 1 - How to root the Desire S
Disclaimer: Be warned, there always a risk that your phone will end up bricked as a result of procedures...