You make all the units as a bmp for every angle.
So if you wanted to change the "archonT" (or archon body (inside the fiery stuff)) you make 238 files called "archonT000", "archonT001", "archonT002", etc. (untill archon 237).
>> You must know how the angle of the unit is set up before doing this.
Then you open Notepad and type this:
CODE
archonT.grp
archonT000.bmp
archonT001.bmp
archonT002.bmp
archonT003.bmp
archonT004.bmp
archonT005.bmp
archonT006.bmp
all the way down to "archonT237.bmp"
then save this as "archonT.ral"
>> Make sure this is in the same folder as all the BMPs!!
open up RetroGRP and set output folder, and type "Compile to GRP" and find the Ral you made and click it. Boom, you know how a GRP that you made from nothing.
(I had to add 51 "archonT"/"darchnT" files to my Green Dark Archon so I could make an attacking Green DA (I didn't make it move like an archon does, lazy me

It just makes the Psionic Shockwave like it summons it) and I had to make my own .ral file, so I know this works)