Explain please. Do you want him playable in the campaign?

EDIT: Oops, didn't see the category :P

What is "Crossroads character" according to you?

You can add a respawn loadout of BLUFOR officer and set callsign of his group to "Crossroads".

I think he refers to the colonel from the campaign.

Yes, I mean the Colonel from the campaign. Thank you.

In the editor you can place the player as a character of the campaign (for example
Northgate or James). Crossroads appears in the Campaign as a character, it would be nice, if you could play him in the editor too.