The easy way to get that model into sp is to make an npc and use the playermodel code.
Are you wondering how to turn the saber into a backhand saber in the second picture? If so you need to download a backhand saber mod. One is included in the "Jedi Supporter" skin pack that uses the reborn hilt. Or search for "backhand sabers" at jk2files.
If your asking for a actual animation that makes walking and running with the saber hold it backwards, well you'll just have to wait till someone gets around to it.