The skin for my model doesn't show up in Zeroeditor for some reason and it is in the msh file and in the folder with the odf. How can I make it so it does show up? Thanks.

The tga and msh files go in the msh folder
ODFs go in the ODF folder

I did that and nothing changed. The first model I created worked perfectly with the texture. The second one showed up but without the texture, that was a problem with the texturing though in XSI i believe. The third one showed up with the texture. The fourth and fith one have not showed up with the texture or has anyone that I have tried to make after the third one. I am using the MeshEx made by Repsharpshooter to if it makes a difference.

EDIT: I got these errors releating to my models in my munge log. Does any one know what they mean?

The first set of errors is as they say very bad, probably didn't branch select everthing (or anything) properly on export so there are no ploygon components probably just the dummyroot null. Try and re-export making sure the bits you want are selected.
The second error is beacuse the tga files must be power of 2 dimensions which means the number must be one of the following
2, 4, 8, 16, 32, 64, 128, 256, 512 or 1024. They can be any combo of those. so the 138 x 138 you should be able to resize to 128 x 128 no problem.
the 292 x 263 will be a bit more fun because if you resized it to 256 x 256 it would get scrunched in one direction.
That is why the one thing doesn't show up textured.

I re exported it with the 512x512 texture and it shows up in Zeroeditor untextured! What am I doing wrong??!!! It worked before why isn't it working now?

EDIT: Nevermind, I got it to work!!! Yeah! Thanks for the tips fragme they helped.