If there are 2 vQmods /vqmod/xml/mymod1.xml & /vqmod/xml/mymod2.xml to change a file (for example) catalog/model/tool/image.php, which vQmod will be executed first in an OpenCart installation?
vQmod loads and executes the xml files in alphabetical order. So for your example /vqmod/xml/mymod1.xml will be loaded and executed first, followed by /vqmod/xml/mymod2.xml