3GS 4.1 to iOS5 Help Needed

[HelpMeMod]

Hi,

Have a 3GS currently on 4.1 and used limerain to jailbreak.

Looking to upgrade to iOS5 but keep getting error messages within iTunes.

What is the correct way to upgrade (after backup) and would I then use redsn0w?

Additional info:
Modem firmware 05.14.02 but, phone has been unlocked by carrier. dont need to worry about baseband updating?
Have new bootrom.

Thanks everyone......

[Simon]

You have to restore to 5.0 not update. Put the phone in dfu and restore in iTunes. Make sure your hosts are pointed to apple or you will get error 3194.

It is a tethered jailbreak on 5.0 though.

[HelpMeMod]

funny you should say that.......error 3194!!!!

how do I change it back?....forgot.

Mine looks like the following:
What do I do???

# Copyright (c) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host

127.0.0.1 localhost
::1 localhost

#Norton AntiVirus Starts.

127.0.0.1 mynortonaccount.conxion.com
127.0.0.1 a204-2-160-40.deploy.akamaitechnologies.com
127.0.0.1 symantec.com.102.112.2o7.net
127.0.0.1 a96-7-151-238.deploy.akamaitechnologies.com
127.0.0.1 lcsitemain.conxion.com
127.0.0.1 lc1alt.symantec.com
127.0.0.1 lcsitemain.symantec.com

#Norton AntiVirus Ends.
74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com

[Simon]

Open tiny umbrella
Click on advanced
deselect the box that says "set hosts to cydia on exit"
Close tiny umbrella and proceed with the restore

[HelpMeMod]

Thanks, is now restoring......appreciate it.

[Simon]

no prob