How To? Retopologize in Blender 2.55?

Greetings,

I am new to BlenderArtists.org, hello to everyone in the modeling forum.

On to my question, I have searched high and low with no avail (I am new to using Blender) of how to retopologize a high rez mesh in Blender 2.55?

Any assistance is greatly appreciated.

Thank you
Geosoph

Here’s a tutorial that shows retopology in blender 2.5
http://www.blendercookie.com/2010/08/30/retopology-and-normal/