I would recommend very strongly against using Cameyo to package a security application that is meant to offer live protection. Even if packaging were successful, it is not the intention of Cameyo software to offer security. Please do not misconstrue Cameyo's sandbox as some sort of defense against malware. Cameyo is strictly for application virtualization. The same malware that attemts to shut down your security software and fails would very likely succeed if the software were virtualized.
An on-demand scanner, on the other hand, might be doable, depending on whether the scanner uses services, drivers, or kernel patching.
For self-packaging, i.e. not using Online Packager, the best method is to use a clean Virtual Machine with the oldest OS on which you plan to use your package, e.g. if you're going to use a package on XP, Win7, and Win8, package on XP.
For a package to work the same on all machines, it's important to package on a clean machine. For instance, if you package on a machine that has Microsoft Visual C++ Redistributable installed and the application needs it to work, the redistributable won't be captured in the package and said package won't work on a machine that doesn't have the redistributable installed.
Ah, I see, I didn't realize we were still talking about AVG. I don't know that any application virtualization software is designed for creating virtual packages of security programs. It would be too risky.
Let me go back a step because now I see that you may not be looking for virtualization at all. If you had an installer for AVG that had it completely configured the way you wanted it, would you be willing to install it on your systems?
All right, if you're fine with an installer, you have some options.
1. AVG forum or a place like ITNinja You can try checking AVG's forum to see if there are command lines or an .ini file you can edit to customize the installation with AVG's own installer. If you don't find anything there, you can try ITNinja, a site that is filled with information on installing with parameters unknown to the average user.
2. AutoIt or similiar automation software via scripting It may be that your customization is too detailed to use AVG's installer even with command lines. If you're able to script what you need, software like AutoIt could be the way to go.
3. Ghost Mouse or similar automation software via recording If scripting isn't your thing, you can try software that records your mouse movements, clicks, and keystrokes. Unfortunately, these types of softwares generally rely on the Screen Resolution being the same when you carry the recording from one station to another. The reason is the software uses coordinates to map where to click. The more you can do by keyboard, the better your chances of success are. I had better luck with Almeza Multiset than I did with Ghost Mouse, but the latter is freeware; whereas, the former is not. If you have different Screen Resolutions from one station to the next, you might get away with temporarily changing the size to match the computer on which you made the recording.
4. Repackage the installer Use a repackager like WinInstall LE or AppDeploy, which, similar to Cameyo's packaging process, relies on snapshots to capture changes made to the system.
I don't know how many systems you plan to install AVG on, but if it's more than a total of two, I recommend doublechecking to be sure you're satisfied with the way the first system that receives the customized installation does before going on to the next.