TouchWiz Calendar and CalendarProvider on HTC Desire

[Guest ebird]

I am trying to install the Samsung TouchWiz calendar and calendarprovider on my HTC Desire. I have tried to install copy the system/framework and system/app files on the Desire, but it does not start any more. I have copied the TouchWiz* files into the /system/app folder, but I does not appear in the apps.

Installing the apps with adb install fails with INSTALL_PARSE_FAILED_NO_CERTIFICATES. It fails with self signed apks too.

I have no idea how to install the calendar and the syncml provider. Can someone help me?