IPSW is a type of file. IPSW is your software version installed on your iPhone. You can check this by going into settings, general, about.
WinPwn is software that can be used on smart phones to either unlock or jail break them. However, using this software will occasionally cause your phone to crash and need to be taken in for repairs.
you can. using blackra1n or pwnage tool or winpwn.
It includes cydia...simmilar to installer app.
An IPSW file contains data used by iTunes to restore and update the iPhone and iPod Touch software.
I am Going To Guess, That IP Stands For iPhone, and SW stands For Software. IPSW = iPhone Software
Iphone Software
yes
This shuold be what you need: http://www.touchpodium.com/2008/04/07/ipswtool-makes-editing-ipsw-firmware-files-easier/
It is better to update both iPhones using the same lines other than downloading another IPSW.
iPhone software also it could mean ipod software
nope, u get the ipsw from apple, the legal distributor