I currently have ics and sense 3.6, but I wish to go back to stock ginger bread, no custom Roms, no HTC sense, no custom anything, just pure stock.
A friend recommend that i use Odin...

But what is the easiest and safest way to do it ? I am willing to take the risk of bricking as my upgrade is dew in March this year, if possible can I do it without rooting ?

Note: I have a pc with a working data connection, tell me what I need.
Thanks in advance.