So, I have this thing where I'm far too lazy to make my own specific custom faces for every sim (and not skilled enough with the creator to duplicate some of the nicer random/premade ones). So, I wind up choosing faces out of the "heads" box fairly commonly. Two of the faces I like the most are YA only. Now, this worked out fine when I decided to make some random CAS students one day and play around with them, but now I've got a bizarre urge to run a quasi-lifecycle mode with them. (It started when two of the sims moved in together after graduation, and I realized they had no actual parents, and thus they couldn't have irritating inlaws if they got married, and, uh... yeah.)
So, is it possible to take a YA face out of the special "Make YAs" creator and use it on an adult, which would then be aged down to a teen? I just like the combinations of facial features and I can't seem to replicate them by normal means. I do want those specific faces because I'm trying to make "the same" sims as I had before- they should hopefully look the same. I tried sticking the YA-only faces in a collection, but it doesn't work- the folder appears empty as far as the regular CAS is concerned.
Anyway, if it is possible, I gather that whatever I may have to do will be extremely technical. I have SimPE and stuff, but I'm pretty oblivious to the, ah, more hexadecimal-flavored end of Sims mods... so if it gets complicated, please explain slowly.