Rpg Maker Developers Group

So I'm making a pretty unorthodox game admittedly... I have a few scenes in my game which uses a lot - I mean a lot - of images (and also few musics) that I essentially want to preload en masse... As just loading the pictures and music normally leads to the image being blank for a few frames when first using, and music not starting immediately when called, which makes the scene glitchy and kinda slow.
I was able to fix this using Chaucer's Scene Stabilizer by putting these image and music files into the so called "permanent assets", and it works super well for the scene, no image blanking or audio stuttering. But for literally everything else, it causes a little bit of lag, since it's holding all that stuff in the cache permanently, which isn't good. It's probably not wise to hold that stuff in permanent caching for the entire game's lifespan, so while Scene Stabilizer is pretty good at solving the problem, obviously it's not the perfect solution, I just need it for that one scene.

Here's what I'm looking for... I want to manually pick some Pictures and BGM files, and put them into a sort of "persistent cache?", which will be like the permanent caching from Chaucer's Scene Stabilizer, but a different script call can allow it to be let go.