[Armistead]

Sure, you can add all the groups you want to RSRD, but best to do so creating your own mission file. As descriibed already, if you want to make changes an existing group in RSRD, do so with notepad.

Most of RSRD groups spawn once, stock spawns groups numerous times, just uses percentages for different ships and spawn chances. It also uses a lot of generics, so simply the group will spawn differently each time, but it still follows the same path. With each group you can set a time limt each time it spawns. Simply, you basically have a percentage factors and time factors for each value

As for contact reports showing enemy location, you have values for that as well.

There is no option other than adjusting groups in the mis folders