Biocrisis

I moved your post since this is not a bug report.
Valid values for spawn_icon should be the following (all text strings):

male1
male2
male3
male4
male pyrotechnic
male engineer
male soldier 1
male soldier 2
male soldier 3
male prisoner 1
male prisoner 2
male prisoner 3
male prisoner 4
male agent 1
male agent 2
male agent 3
male police 1
male scientist 1
male scientist 2
the colonel
tough guy 1
tough guy 2
male commando 1
male commando 2
male commando 3
female1
female2
female3
male medic
female medic