So I have Rooted my SGS... but do I need to...

So I have Rooted + apply LagFix to my SGS, but do I need to:

1) Unroot my SGS whenever I wanted to update to new firmware or update to Froyo?
2) What is the correct steps to unroot? Should it be:
      eg, 1st step = uninstall BusyBox, 2nd step = remove EXT2 Tools,
          3rd step = apply 'Undo LagFix' 4th step = etc ... ???

Need the info as I wouldn't want to mess-up the unroot procedure and brick my SGS. 

thanks for the info..

by the way, how do we actually know that we have 100% un-root our SGS?
I did un-root to my SGS, but under Settings > About Phone > Kernel Version =    2.6.29
                                                                                                     root@SE-S604 #2

Why does it still shows "root@SE-S604 #2" below my kernel version?

I did not only un-root, but after un-root, I also did the hard reset (Factory Data Reset) as well.

hi vamp6x6x6x,

that is what i did, but it still shows    2.6.29            under my SGS kernel version.
                                             root@SE-S604 #2

and I thought by hard reset (Factory Data Reset), it will clear every data and installation files in my SGS (including root files / programs), and by doing so, it will reset my SGS to original state (a.k.a when I first open the box).

sigh... so what does this mean? does it means that the un-root process didn't run 100% cleanly?

and how do we actually reset our SGS back to original state (factory default)? I mean, really..really..really reset back to factory default.

I really would like to reset my SGS back to factory default and starts with a 'clean' phone.

I really can't remember.. LOL ...

Will Samsung void our warranty if they found out that we root our SGS, even we're claiming for hardware defect?

If Kernel Version showing      2.6.29           , Isn't it telling our SGS is rooted?
                                  root@SE-S604 #2

As shipped:

Firmware Version:
2.1-update1

Baseband Version:
I9000ZSJF4

Kernel Version:
2.6.29
seokchanm2l.kim@SE-S506 #2

@ acem, i've the same kernel version 2.6.29 root@SE-S604 #2 even though I did not root my phone. i happened to find this online though... hope this helps. (:
 
to see is you are "rooted" download or use terminal app
At the $ prompt type su <enter>
should return a prompt now of
#
now enter cd /data/app-private
if you can do all that then you are rooted"

i've the same kernel version 2.6.29 root@SE-S604 #2 even though I did not root my phone TOO.

may i know the exact name of this terminal app? i search a lot of them.

Yea Omnian, for awhile I thought the word "root" under my SGS kernel version is the way the phone show that it is "rooted". phweeh...

And sin_way, thanks for your info.