Nope. Second life has it's character built into the code.. they only way thier shape or appearance is changed is by textures or worn primitives textures to look like other shapes.

Really advanced characters are scripted, the original obj character is sized down and rolled into a ball, and primitives are attached and scripted to simulate what appears to be a normal shacreter walking around, dancing, eating, ect. Regular poses no longer work, and a hud needs to be written to control the figure's animation based on scripts, so the character can only do whatever it's scripted to do.

You can't import morphs into sl, and you can;t replace the object that's used for the characters. (the male and female character are actually the same badly uv mapped obj file.)

You could easily take a picture of your own face, and massage in it photoshop or such to look like you in second life, but the whole point of sl is being and doing things that you cannot do in second life.

Plus you have to pay for every texture yo create to be loaded into second life.. so if you didn;t get it right the first time, be prepared to upload it a few times before you nail it down.

All this is covered in the second life forums, BTW.

Way too many people take way too many things way too seriously.