Just discovered that we can do it by using the scapp file extension:

https://www.connectwise.com/blog/Product-Tips/Exploring-the-scapp-File

1) Download the free application QRES.EXE to change the resolution. (https://sourceforge.net/projects/qres/).

2) On the same folder of QRES.exe create a batch file like 1920x1080.bat

3) Add line QRes.exe /x 1920 /y 1080

4) Zip the both file QRES.exe and 1920x1080.bat

5) Rename 1920x1080.zip to 1920x1080.scapp

6) Upload the 1920x1080.scapp on the toobox.

7) Create other files for the others resolution.

The toolbox will automatically unzip the file on the toolbox temp folder and execute the batch file. 

I solve this issue with this trick:

1) Download/Buy the application "Advanced BAT to EXE Converter Pro" This application can embedded an executable.

2) Download the free application QRES.EXE to change the resolution. (https://sourceforge.net/projects/qres/) .

3) Create a simple line like %MYFILES%/QRes.exe" /x 1280 /y 1024 in the "Advanced BAT to EXE Converter Pro" editor.

4) Include the QRES.exe on the Embed file section, select Delete embedded files on exit and  choose an icon if you want.

5) Compile the batch file to create the executable.

6) Create another executable according to the desired screen resolution by changing the argument of QRES on the editor.

7) Upload the Executable on the ToolBox.

Hope this helps