First step..
You set the input event to 'OnBotSpawn'
Second step..
Set the target to 'Bot'
Third step..
Make the output event to 'SetAppearance'
Fourth step..
Set the Output Parameters (Appearance type) to Custom
Fifth and final step..
Set the 1st number to '0'
Set the 2nd number to '1-9'
Set the 3rd number to '0'
You are done! This is my first tutorial on BL forums, I decided to make this a bit long because some people will get confused! I know that a lot of people know this, but this tutorial is for people who are quite new to the game or new to eventing!
The image below is proof that it works. (I will try to help you if you are having trouble with it)