Question about Volcano Man's Alt pack

[Jazman]

VM's work changes the unit artwork, and adds variants of scenarios. Stock versions are not affected. If he's changing unit values, he creates a separate OOB file, and his scenarios use those.

For example, in Stalingrad, there is a stock OOB:

Stalingrad '42 Dec.oob

but VM's scenarios use his:

Stalingrad '42 Dec_Alt_McNamara.oob

(now, there might be a number of oob files for any game.)

He never overwrites core game data files, but does overwrite the artwork. What I used to do, before I knew what I was doing, was to zip up the entire game install directory, then I could restore if I messed up or didn't like what happened.