I hope this helps.

1)

follow this Tutorial if you download off the workshop

https://www.youtube.com/watch?v=CsJcd4jvgqY&t=97s&ab_channel=GunterSeverloh

The path to the mission (will only appear after being played in game first)

C:\Users\XXX\Documents\Arma 3 - Other Profiles\XXX\Saved\steam\Russian%202022%20Invasion%20Identifiers%2e.VR

YOU WILL NEED A PBO TOOL.

-----OR----

Find a RARed version on my youtube page.

2)

Copy the .paa files into your mission located in documents folder.

3)

--Optional--

If you need help with the attach to command you can load the example mission in the EDEN editor and use Control C and V to copy across missions.

Please post comments if you still need help