How to mount an image with .ori extention

hi frendz...........

i have installed NFS-Hot persuit-2 but it needs the Cd to remain in the Cd-ROM during playing. i intented to play game without Cd. So i learnt how to mount images, then i installed Daemon tools to mount images. But the PROBLEM now i m facing is that............ the image file for this game is NfsHP2.ori which this mounting software doesn't support.

I need to know how can i mount this image?