Editing MMD models

[Sardonyx Today]

So I have just ported some MMD models to Blender with the intention of porting it to SFM for future projects. However from the guide I am reading, it says that I need to rescale the model to the size of Source models and to rename all bones accordingly before I import the model. However it skims over the details of how to do so and I would greatly appreciate if anyone who knows this process could help me. Here is the guide I was reading: https://steamcommunity.com/sharedfiles/filedetails/?id=1544810281