I'll type here for you to see.

The avatar rig is rotated in the wrong direction...

Red is X

Blue is Z (up)

-Y is where our avatar points.

We want our avatar to be on X.

This is not as easy as just rotating everything.

And this is the problem that I show you how to fix.  It is why I prepared a separate rig.

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I have to get the rig informtaion, called "weight data" from the original avatar, and transfer it back after I rotate everything and have finished setting up the new bones.

Let's get started.  I'll do only one of these mesh, the target (hourglass), you'll have to do the rest yourself.

I started typing here because this is where you will repeat the process for each of the mesh, you don't have to prepare the bones again from the previous max file.

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Inside that list you will find the tools I will use.  I have one of these tools called SkinUtilities, already in my buttons panel.  This is why you don't see it here in the list.

I will save the skin data to a replica of the mesh.  This mesh will be a clone of the original with some differences.  This new mesh will be deposited into the active layer, indicated in blue...

I will do this with all of the mesh that is skinned.

Now that I have all of the skin data, I want to compress the original meshes down, to get rid of the skin data on that one.. we have to take this step.

double click the layer label to select all in that layer.

Now we're ready to move on.

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Everything that I just "merged" will be selected, now we have to rotate everything that is just merged, selected...

By 90 degrees, you can keep your eye on this indicator...

This next part has become essential because of the amount of bones available with the extended skeleton now.  I have to make sure I only use the bones I need.  It's not too hard to do that because I know I'm not making a bento head or an animal.  I'm simply rigging a fit mesh body to its original state.  This will require the standard skeleton bones, fit bones, and... well, maybe the fingers.. it won't hurt to add them in.  Here's how I do it by making selections, sorting into different layers.  What we have here are mBones... bBones and cBones.. cBones are the CAPITOLIZED names, mBones start with an m...

bBones are bento bones that were added later.

Let's start sorting so we don't use too many bones.

I made a mistake making a new layer, I'll fix it

Ok, there's a lot of mBones, but the standard ones are the only ones we need.  Aside from maybe groin if the avatar uses that, I don't know.  It won't hurt.

Let's start sorting, I know which ones to take because I've been doing this for quite awhile, you'll have to just keep watch.

I did it again

Now I have to make selection sets so I can add the bones fast, to the skin.

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Now it's time to restore our kit.. transfering the original weights back, perfectly.

I forgot that the bones have to be visible in order to add them to the skin

I'm going to load an animation to test this and show you that it's not complete yet.

NOw to transfer the weights

I need to select the skinned mesh and the skin data mesh that contains the weights.

That shouldn't be broken

I might be missing a bone

I have to assume that there was sonthing wrong with the kit I used, this is from a person that wanted me to show how to fix a skirt, I used her kit instead of mine.. it has to be that, I'll just ignore that for now, I know I didn't make a mistake.

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I'm going to do one more, but I think I was given a bad kit :/

That one is fine.

Ok, the kit is broke but they have a clean one, I'll finish this video and skin the skirt, upload, and that'll be the end.

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Right click on a spinner to reduce it to its smallest value.. watch...

Go get yourself the fbx converter or you're going to be waiting a long time for max to export dae files.  Export as fbx and use the converter to get your dae file.. here's how and the link will be in the description...