Reload Steyr is not a valid action. You don't specify the weapon he reloads, just that he should reload. Why don't you try it with:
SC1 action["reload"]
edit
I've messed about with what Tomby told us here, and I found some things out.
You can never exceed 15 for the number of items (WeaponSlotItem or 256), because then you will be left with only your primary + binoc-slots.
I'm also experiencing random crashes when I run it at 15. I will experiment more to see where the problem lies. Let's just hope it doesn't auto-crash if you go more than 10.
edit2
Okay, 14 seems stable enough. Need to check this some more, as I can't pick up any MGs. Might be that I've left out a slot or something.
edit3
Yup, if you have primary + secondary slots you can get MGs. And so far, 14 slots is stable. So you get 4 extra slots. *Drools over the thought of a BAS M249 SPW with 1400 rounds*
edit4
Okay, I like OFP now. *Really* like it.
Same PBO that worked 100% last night doesn't work at all today, it crashes the game.
*Kicks OFP and goes back to bed*