DD11 Win7 then installing XP and use the OS Selector

Hi
on a existing Win7 x64 system i want XP as second OS
in working processig XP must Hide when Win7 work , and Win7 must hide when XP works

I have one Harddisk with three partitions
1. Win7 x64 MBR System 100MB (created by win7)
2. Win7 x64 Boot when win working it was Driveletter C
3. Empty Partition

1. Question
I want to start with the DD11 CD whitch comes with the Acronis DD Package
I want to Hide the Win 7 Partition, then rebooting with XP CD and install
the XP on the empty partition.
but there was no Hide Function in the Menu ??

Then I Boot form HardDrive the existing Win7 and install DD11,
Now i have in the Menu the Hide Funktion, but you can't Hide a running OS *g
Now i install the OSS, reboot and the boot menu shows.....
Win7 and a non existing Drive A ? (not enabled in Bios)

Now i Hide in the OSS Menu Win7
when I testing the UnHide Button it dont come back
also manually recognition failed
So i boot win7 again deinstall OSS , reinstall and now Win7 was back in the OSS Menu.
After using a serveral years of Quarterdecks Drive Magic this is now very strange for me.
What I do wrong?

2. Question
If you boot from the DD11 CD and click the recovery expert function
and then click the Back button, system hangs ?
If you click next and then the back button, the system goes correctly back to the DD1 menu.

with best regards