Help with editor!

Like many of you I have been fiddling around with scenarios and campaigns in the editor since the launch of the DE. Almost everything seem to work the same way as the original game - I do however have some questions, and I´m now reaching out to the community in hopes that some of the more technically gifted among all of you might be able to lend a helping hand.

Firstly, I´m not sure how to aproach adding pre-battle instruction maps for my scenarios. If I remember correctly - in the original you were able to just create images in photoshop or whatever and paste them into one of the game folders. Do any of you know if this would still work, and if so - where it should be pasted, and in what format?

Secondly, it would be fun to add a voiceover to the campaign screen, and in the messages panel in the editor there is a drop-down meny indicating that you should be able to add a voiceover to your own scenarios. Is this the case, and if so, how would i go about adding such a voiceover?

Thanks in advance!