To do this you have to jailbreak (hack) your phone.
a lot of trouble to go through just to get rid of the stocks app. A little dangerous is you do not know what you are doing.
Just move the stocks app to a different screen and forget about it. 😎
Wirelessly posted (Treo: Mozilla/5.0 (iPhone; U; CPU iPhone OS 2_1 like Mac OS X; en-us) AppleWebKit/525.18.1 (KHTML, like Gecko) Version/3.1.1 Mobile/5F136 Safari/525.20)
you could always ssh in and do an "rm -vf" command, that would sure get rid of it 🙂
(DO NOT actually use that command, it will wipe all data and programs from everywhere. It's just a joke)