Possible to convert character to R15 without changing game settings?

I have this script that only works with R15 due do body part locations. I want the user to be converted to R15 whenever it uses the script.

However, i DO NOT want to change the game settings to force R15.

I heard of Humanoid.RigType, but when i change that the player just dies.

I am asking if there is any way using a script to convert the player to R15?

EDIT: I am making a script for Void Script Builder. So changing the game settings is NOT POSSIBLE.

Player character humanoid have a property named RigType

Just change that property to R15 and maybe after respawn the character will be on r15.

If it wont work, I dont know then.