Assistance recovering to Dissimilar Hardware

Hi
I have read a few articles regarding this but have as yet not had success restoring a image to dissimilar hardware, i either get a BSOD which flashes on and then the system reboots or i get a BSOD with the Inaccessible boot device error.

I need someone who can assist to complete the restore, the system i critical to our process and the hardware is on its last legs.

What information would be needed for someone to help?

Regards