Are there any decent tutorials on how I can temporarily disable all the default painting options a Sim can randomly choose so that when I record a video of a Sim painting a picture, they will have no choice but to choose a custom painting that I intend to have one of my Sims paint beforehand?

I intend to have one of my Sims paint a large portrait using a Matrixxe Holographic Easel by Korben Computing (this is an object from the Into the Future expansion pack, so the default paintings I will need to replace my custom painting with will be different from the ones that most other easels use), but with the custom painting option already made, so I don't have to choose a subject while recording the video, therefore eliminating the need to have to deal with camera zooming limitations, not to mention Sims can only seem to choose subjects in the same room as them which completely restricts my creative autonomy.

I've never made such a mod on my own before. So I'm not sure how to make a mod that replaces all the default paintings with just one custom painting.