Anims and skin assistance for my first mod

So, I’m a new mod creator. I’m currently making my FIRST map for my FIRST mod but I’ve made GMod maps before though. I’m trying to get a scientist to sit down but it’s not working. When I tried with the actbusy, he doesn’t move. When I tried with scripted_sequence, he just magically disappeared. also, while we’re in the topic of scientists, How do you make his skin the Pre - Resonance Cascade skin?

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.