Certificate on Windows Mibile

I have used this whole guide to succesfully setup a PEAP/WPA2 wireless network.
Enforcing the installation and preferred network with GPO works perfect.

Here is a funny thing about the certificate with Windows Mobile: When you import the cert using the tool in WM is is stored in the Root Authority folder. When you configure your Wireless Network, and specify PEAP as EAP type there is a Properties button where you can select the certificate to be used.
However it only shows the certs stored in the personal folder........
Nevertheless it works perfect. And if I delete the root certificate it doesn't work anymore.