read the sticky up top mate! that and I have no idea what you asking.. you can't add cydia with formatting.. ----------
my only guess is he thinks he can some how install Cydia without Jailbreaking.. other then that I got nothing..
i was thinking he had a tethered iOS5 jb going on...and wants to update to 5.0.1 and hopes his jb will stick? i dunno..im confusing myself now.
I think OP puts a very poorly ask question here as well as not elaborate exactly what he wants. However, I think this is what OP wants to ask. He currently has 5.0.1 on his phone and he wants to jailbreak it. So, his questions are; 1. Once he jailbreak his phone, does the jailbreak wipe or delete anything from his phone? 2. Does jailbreaking tool just add Cydia to his phone without formatting his Iphone, another word, wipe everything off his phone. The answer for both of the above questions is "No", it will not wipe or delete anything from your phone, you will not need to restore your phone before jailbreaking. However, 5.0.1 is a tethered jailbreak. Please refer to www.iclarified.com and/or redmondpie.com for tutorial and information about tethered jailbreak before you proceed with this. Like Labman & Rick, I have a hang over as well. So, If I have not answered your questions above, then you will have to elaborate more on your questions to all of us.
I like it. Do you have picture of your avatar doing while the cat was smoking? You must have a wild party last night!