i am guessing you are trying to jailbreak your device. it can all depend upon each device but it shouldn't take to long. My suggestion, if possible don't jailbreak with redsnow, try jailbreaking with greenpois0n or limera1n.
hope this helps :)
It is safe except it is tethered jailbreak which means if you try to reboot your device or the battery dies you will have to plug it into your computer and use RedsnOw to be rebooted. Go to YouTube and look up redsnOw 4.3.5 jailbreak which will show you how to do it.
about 10 minutes
About up to an hour at max
Nope.
For 3.1.3 i recommend going to redsnow and downloading the latest version. then go and find a download for 3.1.3 firmware and follow the instructions on redsnow
Reboot means restart. It does take awhile in the Jail breaking process.
Just go to Google and type in: redsnow 0.9.5 beta 5 download for Windows Tons of stuff will come up with download links.
Yes unfortunately it cannot be done with jailbreakme which is by far the easiest way. Despite what others say it only works with 4.0/4.0.1 You must use a program such as redsnow or green poison to jailbreak. These can be downloaded by typing redsnow (or green poison) download link. You need to download this to a computer and click the zip file it will show two things for the redsnow download. Click the second. The rest of the instructions will be displayed. NOTE: If you get stuck at the "waiting for reboot" stage try unplugging and plugging in your device again. It still may not work. It has been this way for many and they are trying to fix the bug right now
basically just wait for it to turn off(run out of battery) then plug it into the computer and in redsnow reboot it by putting it in DFU mode
will the fantastic four reboot take place in the same universe with the x men film series
yes it is you can use redsnow to do it
Yes. Download the newest version of Redsnow.