Thanks to the Dark Force Team who were also responsible for Porting Windows Phone 7 to the HTC HD 2. This is an SSPL for the HTC HD Mini which will allow you to flash unsigned or ignore the CID check before flashing. This will also allow you to flash other Operating Systems like Android on your HTC HD Mini.
Download DFT_SSPL_MINI.exe from here
- Connect you device to the PC don’t connect your HD Mini in the 3 color screen, it should be running Windows Mobile
- Run DFT_SSPL_MINI.exe which has been downloaded before
That’s it your done now you will be able to flash any RUU or Rom from the XDA Forums!