Need to get this to replace Alyx

Hi, pretty new to this. Just started fooling around with model swapping and I downloaded some that did work and some that didn’t. I got Samus to replace Alyx, but when I tried replacing Alyx’s files with Miss Spencer’s it doesn’t work. I think theyre both ragdolled. Maybe Miss Spencer is missing stuff or isn’t configured the same way Samus is. If it isn’t too much trouble, anyone wanna make Miss Spencer ‘Alyx-swappable’? Or maybe I’m not doing something right with the swapping process. Thanks for any answers.
*credit to creativeuncut
*credit to mario64n