it really comes down how deep you would like to intergrate MS Project to Enterprise PDM. Due to the fact that EPDM is highly Windows integrated, we can exchange a lot of information with MS Project without any Plug-In.
Obviously we can manage the MS Project file within EPDM naturally, because it is a windows file. We can also connect important MS Project information to a EPDM variable, etc......
I would start to review the SolidWorks Customer Knowledge Base and search for MS Project..... There a a lot of useful inforamtion what the basic functionality is able to provide.
Additionally check out YouTube and search for MS Project Enterprise PDM...there a different Partner available with solutions and integrations that may be helpful for you.
Hope this helps