Here is a compilation of the Assembly Guides for the mecha I've done for Critical Mass Games.
In alphabetical order...
Arc Fleet Walker and Advance Variants
Blackguard Assault Mecha
Guardsman Assault Mecha
Gunman Assault Mecha
Ravager Assault Mecha
Vanguard Heavy Support Mecha
Also, for those of you who want some size reference shots of the resin and pewter parts from the Mecha Workshop, here's a PDF link from CMG.