it's a new tweak on Cydia that enables "multitasking gestures" without the need of X-Code/Sn0wbreeze/Winterboard. anyone tried it on lower firmwares? there seems to be no warning for it...
I actually went in using ifile and made the gesture's work. But I saw your post and thought why not. I installed it and now I have the option to turn the multitasking on/off. Thanks for the post. And btw it works.