Could you explain what happens when you try to use a player skin for a biped model? I'm not entirely sure what you mean by didn't work, as there are a lot of different possible interpretations.
Also, what MCreator version are you using, and what Minecraft version are you using it to make a mod for?
Recently the texture mapping for biped models has changed so that it is actually the same as a player skin texture now.
It used to be different, and it may still say in the MCreator interface that player skins are not biped textures, but that is outdated text.
In any Minecraft version supported by the most recent MCreator version, a player skin texture is all you need for a biped texture.
I tried it with a player skin and it didnt work
Could you explain what happens when you try to use a player skin for a biped model? I'm not entirely sure what you mean by didn't work, as there are a lot of different possible interpretations.
Also, what MCreator version are you using, and what Minecraft version are you using it to make a mod for?