The Covert Mission files have been renamed by me to follow the original WC naming convention. ie. WC file extensions are .000; Secret Mission 1 files are .001; and Secret Mission 2 files are .002. So, for Covert Missions (SM1.5) I set the file extensions to .015.While on the subject of special material included in WC ports, Shades captured the animated gif above from the SNES version of The Secret Missions (1). It's a small snippet of the game's modified intro that discusses where the Sivar superweapon came from - War Hammer XII! Check the full intro out below!
briefing.sm15 ~~~> briefing.015, camp.sm15 ~~~~> camp.015, module.sm15 ~~~> module.015, title1.sm15 ~~~~~> titl15.vga
Then, within the Secret Missions 2 executable file (sm2.exe) I used a hex editing program to change the .002 extensions for the three files to .015 and the title screen file name from title1.vga to titl15.vga. I saved my changes to a new file named cm15.exe.
Using this method you can place the new Covert Mission files in the gamedat folder along with the Secret Missions 2 files. Starting the game with cm15.exe brings you to the Covert Missions title screen and off you go from there. :)