As topic title says, how can i remove an add-on so that i can integrate a new version or just remove it completely?

You have to be more specific on the addon, is it a INF or SVCPACK addon?

If its a INF or SVCPACK addon you want to "Update" and all filenames are the same you just overwrite the files in the i386 with the new INF, CAB or EXE files

Updating works fine .

But how about removal? I want to remove the add-on of daemon tools so that i can use the alcohol add-on.
(both add-ons from this forum)

the recent versions of daemon tools create a start menu program group with an uninstall shortcut. if you are using a slightly older version, you will be able to uninstall it from control panel -> add or remove programs

Yeah i am aware of that, but i want it to not get installed in the first place, meaning remove it from the unattended installation.

You can remove add-on manually:

From SVCPACK:

-locate your application/add-on into /SVCPACK folder and delete it
-copy file /i386/SVCPACK.IN_ into new foder and expand with : "expand SVCPACK.IN_ SVCPACK.INF" (in cmd.exe window)
-edit and locate the line with your add-on to be removed and delete it ( you can see all add-on under [SetupHotfixesToRun] section )
-save your modified SVCPACK.INF
-re-pack your SVCPACK.IN_ with: "makecab SVCPACK.INF SVCPACK.IN_"
-overwrite old SVCPACK.IN_ into /i386 folder with the new created file
-recompile your ISO CD and test it!

From RunOnce
-delete your addon from $OEM$ folder
-edit /i386/winnt.sif and remove the line that start your add-on at first boot (u can see that line under [GUIRunOnce] section)
-save, recompile ISO CD and test it

Good luck !

Thank you, thats what i wanted