This thread is to record comments/questions on a guide I have posted up on my site regarding the steps to get a fully working Windows 8 Developer Preview install onto the HTC Shift.
The process to get...
You could try www.distant-earth.com/wmobile/cabs/Signed_Disable_Cert_HTC.cab.
That is signed for all HTC devices and turns off certificate checking.
EDIT: Helps if the URL works ;)