Can I rename Newer models of a Valve rig to ValveBiped? - i.e CSGO's Legacy mode

[Malaxus]

Since CSGO updated their CS models, labeled under/as legacy, their skeletal rig is different, but the general structure of a ValveBiped is still there. How would I proceed with renaming all the bones of the new legacy model to ValveBiped in order to implement HL2/gmod animations that worked with the older CSGO rig.

When I did rename, there were some leftover bones from the newer model that were never renamed to ValveBiped, I do not know if that would result in anything? I know it is possible to rename the bones and have HL2 animations play on newer models, but I cannot figure it out.

My attempt at importing HL2/gmod animations to the renamed bones and deleting the remainder that weren't "converted"