That wouldn't be a good idea. DockMod doesn't check your OS version... instead it checks the build version of the Dock.app. If the build version is different than what it expects, then that means the offsets of functions in the binary will be different. And since the current DockMod just statically patches bytes at certain offsets, then these offsets are most certainly going to be incorrect.
With that said, if you are intent on experimenting, take a look at the patches.plist file inside the GUI dock mod resources folder. There you'll see a dictionary of patches under the key "1168.6" or something like that (going off of memory). That 1168.6 is the Dock build version that DockMod matches the patches to. You can change that number to the number found for CFBundleVersion in the Dock.app/Contents/Info.plist. Just keep in mind that if your Dock crashes, you should know how to use the command line to restore a backup (and make a backup first)!
The DockMod app that I'm just finishing up now, however, does not just statically patch. It's a smart patcher, and will likely persist through different Dock build versions. It is very close to being finished, just finishing up some code to handle adding an image to your dock instead of just colors, as well as a PSD template so you guys can make your own images.
Here's a preview of the new DockMod: