Root to Un-rooted???? Newb

[jkz200]

I rooted my G1 to JF 1.51 but im so confused by how many ways there are to un-root it. Could i just use a complete cupcake update with recovery image and the boot img? with out wiping or downgrading? or do i HAVE to downgrade then upgrade everything all over? Complete explanation with all the steps would be greatly appreciated.

-James

 

[Swizz]

http://androidforums.com/updates-cupcakes/5084-question-should-i.html#post32671