windows movie maker split screen

how can i put two image’s on one video on windows movie maker for free ?
like a split screen sort of thing for free is there any free software that i can get to do this i want to put me playing guitar on one side and me playing bass on the other side at one time
uhm, from what i remember i think you need to get adobe photoshop. This should do the trick. You could download the trail.
Clone Yourself! Windows Movie Maker Split Screen Tutorial