Following new features have been added in the latest Bakes on Mesh project viewer release, which can be downloaded here http://wiki.secondlife.com/wiki/Release_Notes/Second_Life_Project_BakesOnMesh/5.1.6.516270
5 new bake channels
LEFT_ARM_BAKED
LEFT_LEG_BAKED
AUX1_BAKED
AUX2_BAKED
AUX3_BAKED
To use the new bake channels, the corresponding slot in the Universal wearable type needs to be set. You can use the new bake channels on the face of a mesh.
Universal wearable type - A new wearable type called Universal has been added. The Universal wearable has slots corresponding to all of the new and old bake channels.
Avatar wearables are baked into eleven different textures (BAKE_HEAD, BAKE_UPPER, BAKE_LOWER, BAKE_EYES, BAKE_SKIRT, BAKE_HAIR, BAKE_LEFTARM,BAKE_LEFTLEG, BAKE_AUX1, BAKE_AUX2, BAKE_AUX3) by the baking service. You can now apply these textures to your avatar’s object attachments' diffuse texture slot. Right click on the attachment, click edit and from the edit face menu select textures. Click the diffuse texture icon to open up the texture picker. The texture picker has an extra radio button mode called 'bake' for selecting server bakes. The 'bake' radio button mode has a dropdown for selecting BAKE_HEAD, BAKE_UPPER, BAKE_LOWER, BAKE_EYES, BAKE_SKIRT, BAKE_HAIR, BAKE_LEFTARM, BAKE_LEFTLEG, BAKE_AUX1, BAKE_AUX2, BAKE_AUX3 server bake textures. When an attachment is using a baked texture, the corresponding base mesh region of the system avatar is hidden
Known limitations
Currently the tint setting for textures in the Universal wearables is not applied. This should be fixed in a future build.
To test the new bake channels you have to login to “Bakes on Mesh” region on aditi.