Help with adding a face with free tools

[tee.dubs]

I've bunged up me model, does anybody know how to add a face to a mdl file, without having to import it back into milkshape (or any other modeling program), re-rigging the skeleton and all the other things needed to be done? eg, are there any of oinkerwinkle's or any functions within mago's, or any other free mdl editing tools?

here's the face needed:

Deepest gratitude to any help, +rep of course.

 

[ikillforeyou]

mdlvis.

 

[chilla_killa]

Does vertex modify do this? I think yes

 

[tee.dubs]

mdlvis.

Thank you sir!

Does vertex modify do this? I think yes

I've already tried and to the extent of my efforts and found no possible way, but thanks for the suggestion. It's the thought that counts and i appreciate it.