How to create a new chapter to may campaign?

[rare palm]

I am trying to create a campaign with multiple chapters, but it won't let me add a new chapter.

[granite hatch]

show where your map bin is

[rare palm]

It's a simpler version of the main game

[granite hatch]

i advise putting an order to your bins

[rare palm]

how?

[granite hatch]

like 1-City_Simple-Side.bin

[rare palm]

ima try

[granite hatch]

0-Prologue_Simple_Side.bin

[rare palm]

ok

It worked!