See details in DC help file
Copy-paste to multiarc.ini
and enable in Options > Archivers.
Also some separate files can be found here (use Options > Archivers > Other... > Import).
[AppImage]
Archiver=7z
Description=AppImage (Type 1 and 2, x32 or x64)
ID=7F 45 4C 46 01 01 01 00 41 49 01, 7F 45 4C 46 01 01 01 00 41 49 02, 7F 45 4C 46 02 01 01 00 41 49 01, 7F 45 4C 46 02 01 01 00 41 49 02
IDPos=0
Extension=appimage2
Start=^-------------------
End=^-------------------
Format0=yyyy tt dd hh mm ss aaaaa zzzzzzzzzzzz pppppppppppp n+
List=%P -r0 l {-p%W} %AQ
Extract=%P x -y {-p%W} {%S} %AQ @%LQU
ExtractWithoutPath=%P e -y {-p%W} {%S} %AQ @%LQU
Test=%P t -y {%S} %AQ @%LQU
PasswordQuery=Enter password
FormMode=8
appimage2
is a fake extension, this is a small workaround to open AppImage files with Ctrl+PgDn only.
[Base64]
Archiver=%COMMANDER_PATH%/scripts/base64uue
Description=Base64
Extension=b64
Format0=yyyy tt dd hh mm ss aaaaa zzzzzzzzzzzz n+
List=%P -l %AQ
Extract=%P -d %AQ %FQ
Add=%P -eb %AQ %FQ
[InstallShield]
Archiver=$COMMANDER_PATH/scripts/unshield
Description=installshield
ID=49 53 63 28
IDPos=0
IDSeekRange=0
Start=^Cabinet
End=^--------
Format0=z+__n+
List=%P l %AQ
Extract=%P x %AQ
FormMode=6
Script unshield
[UUEncode]
Archiver=%COMMANDER_PATH%/scripts/base64uue
Description=UUEncode
Extension=uue
Format0=yyyy tt dd hh mm ss aaaaa zzzzzzzzzzzz n+
List=%P -l %AQ
Extract=%P -d %AQ %FQ
Add=%P -eu %AQ %FQ
[wcxtest]
Archiver=$COMMANDER_PATH/scripts/wcxtest
Description=TC WCX Test - https://totalcmd.net/plugring/WCXTest.html
Start=^---------
Format0=$z+$yyyy?tt?dd hh?mm?ss$aaaaaa$n+
List=%PQU -l %AQ
Extract=%PQU -x %AQ %LQU
FormMode=10
Script wcxtest
[cmdtotal]
Archiver=$COMMANDER_PATH/scripts/cmdtotal
Description=cmdTotal - http://totalcmd.net/plugring/cmdtotal.html
Format0=$?? n+
List=%PQU l %AQ
Extract=%PQU x %AQ %LQU
FormMode=2
Script cmdtotal