The direct way to do this would be to mount it using the OS running on your desktop, but it it likely that it does not have drivers for the QNX filesystem, or only has read-only support. We need to mount the disk image of the simulator in an environment where we can modify any of its files. Users familiar with unix can skip to the high-level overview at the end of the post. This is useful for people who want to study how BlackBerry's QNX-based OS works, or who need to debug low-level problems with their applications. Here's an easy guide to getting root access on the BB10 simulator.