To activate syntax highlighting under linux, copy filetype.vim into the .vim directory in your home directory, and copy tpl.vim in the syntax subdirectory of the .vim directory. That is,
There must be a way to activate highlighting under Windoze, but I can't figure it out.
The syntax highlighting is an extenstion of default Vim C++ highlighting and is generated from the ADMB flex input files. Template sections are highlighted as C++ keywords and ADMB template types are highlighted as C++ types.