Im really want this things in pb2... but more anything dead bodies grabbing and throwing it... to grab a body you need to press shift (or e) and ctrl (or r) to enable defense mode with body so eric gurt you can add it with shift and ctrl or alt e and r with broken body you will hold it if 2 pieces in two or one hand (again choice is your's eric gurt) and in defense mode defense zone smaller and defense better and to made wall slide you need to jump at wall and hold s at it(and yes if you make this falling with high speed it not work and too lower height lower wall slide start speed)
eric gurt you can add trigger command to disable wall sliding and dead bodies grabbing(by default it enabled and you can push player while grabbing it body (another my idea to game viewtopic.php?f=146&t=24579)
And yes wall sliding idea from plazma burst 2.5