I agree, and it worked fine on the iPad 1, now I can't even activate it through xcode. I almost never used my home button from the time these were available till now, and now thats my only choice :/
Well that's logical the gestures configuration is stored in the SpringBoard.app in a .plist which is not saved on the iTunes backup, nor accessible for editing via some phone applications on Windows and OS X and not the same than the XCode one.
But at last the the latest Redsn0w I could finally put back the gestures to the iPad 1 with no full jailbreak and all Apple apps work. (The problem for them was that the jailbreak move files around, thing that I dislike)
With the latest RedSn0w Beta there is now a checkbox (unchecked by default) to "Move applications" by the jailbreak, if you don't Cydia will do it for you later. (with the same problem for Apple apps like mail and Safari)
I simply launched RedSn0w beta with installation of Cydia unchecked (since I 'm not interested in it and I didn't want to have it's white icon cluttering my springboard) and " Enable multitask gestures " checked.
After the jailbreak everything was working O.K then I rebooted the iPad to check if nothing would break.
Everything still worked as it should. (Simply by not moving applications)
That's a good thing for all those who want to get the gestures back without doing a full jailbreak and risking problems if the device had to be restarted.
Enjoying again the gestures.
Update:
Since my method of bringing gestures to the iPad 1 under iOS 5, there's been a news about it on OSX Daily that someone from ModMyi has modified RedSn0w 0.9.9b5 to only do the gesture patching without really jailbreaking. (Removing the Jailbreak part in fact)
A tool I wanted to ask for, but since they brought jailbreak without moving files around, I served my purpose alas with some files modified.
iPad 1 Gestures and Display Mirroring Without Jailbreak