This post explains the steps I took to make my Mac keyboard work more like a PC keyboard. The goal here is not necessarily for keys with the same names to be in the same position (e.g., the Ctrl key), but rather to have the same functionality across platforms when pressing keys located in the same positions.
Until last summer, I mainly used Windows and various distributions of Linux. Last summer I got my first laptop, a MacBook Air. I still use Windows on my desktop computer, and I have Xubuntu installed on VirtualBox virtual machines on both my desktop and laptop.
Both Windows and Linux (i.e., the distributions that I have used) have similar key bindings. For example, Ctrl-C is used for copying on Windows and it is also used for copying on every desktop environment I have used on Linux. When I started using OS X, I quickly realized that it uses a different set of key bindings. For example, the key binding for copying is Command-C, and the Command key on a Mac keyboard is located in a different position than the Ctrl key is on a PC keyboard.