Yes and no.
If you just want to move him about with vectors, that can be done with playmaker.
but controlling a player with playmaker via the char motor cant be done (without the actions)
The actions that come with playmaker include controller move and controller simple move
you could use these to set up a basic controller but these actions dont act according to your char motor settings.
The thing about playmaker is anything is achievable. just spend some time with it!
Sure you can, but it will take some work for you.
You can send stuff to any script that you use, but to make a complete character system only with Playmaker will take time and right now I do not see the benifit to spend that time.
But I use a normal script for this and use playmaker for all most all other stuff, like AI, meny, score etc.
In the end you decide how much you want to use it and how much work you will spend to make stuff work.
I know it will save a lot of time with playmaker and there is also alot of other plugins that has playmaker support.
The best source for information and help with playmaker is here.