Getting the CV boot off without damaging the boot

[chrispy.clio]

I have a spare driveshaft with a good cv boot. And i have a good driveshaft with a nackered CV boot.
I have taken the split cv boot off beacause i ripped it open and took a grinder to the clips. But i cant see how i can get the nice cv bott of without dammaging it.
Anyone help.