There are two modpacks: WolfRevolution, and Rise of Mankind which incorporates extra stuff and RevDCM. In terms of merging telling you how to merge RevDCM with another specific mod, that's a little complicated, not sure if I can really just explain it. Basically you take RevDCM and make that your base mod, rename the folder. Then alter the name in the modname.py file, and copy the overarchering RevolutionDCM ini file, rename it and alter the name written in the file. Once you get that done you need to merge all the XML files that you find in both mods, and this can be as simple as overwriting them, or as complex as manually snipping out bits and pieces. You need to do the same thing with Python. If they both have a custom DLL you need to do that with the source code as well, and recompile a core. So depending on the level of modding that's in extra, this can be a serious Pain in the .... And to be honest, no one can really tell you how to intelligently merge Python or SDK, or even really XML for that matter. You just need to figure it out.
If you're really not satisfied with one of the available RevDCM merges, and you're not willing to roll up your sleaves and do all that merging of code/data. Then your best bet is to ask Chiyu to merge them for you, or offer a merged version of her mod.