Yes, the TOE may be added to older mods and scenarios. Pace ernieschwitz, I would do it freely ... but only for myself, and not for sharing publicly.
Load the scenario. On the scenario description window, click the button at the bottom marked "Edit".
A map will appear. At the top-left corner of the screen, you will see a number of buttons, each allowing you to edit some portion of the scenario. Click on the one on the top row marked "Setng", or "Settings".
At the top-left corner of the Settings interface, you will see a scrolling list called "Property Sheets". Select "RuleVars".
At the left-center of the Settings window will now appear a list called "Rulevar Groups". Click on "Enable/Disable Features".
In the list of Rulevars that now appears, you will see, after you scroll down to the bottom, Rulevars 531, 532, and 534. If any of these do not have the value "1", then click on each, press the button "Change Rule Value". In the pop-up window, enter the value 1 and click OK.
Now you need to save your changes. At the top-left corner of the screen, in the collection of button there, click on Map. The map will appear. Below the map, you will see a computer icon. Click it. Click on Save. Use a new name, such as "Bomburmod1930v140-TOE.at2".