I am trying to do few modifications to Gonzalo Medina(GM)'s award winning contest entry. I want to change the fonts GM used in the header box. I achieved partial success by changing following lines in GM's gridleno.sty
\color{headtitle}\Huge\lecturenotename \\[6pt]
\fontfamily{cmr}\fontsize{17pt}{20pt}\selectfont\scshape\@topic \\[6pt]
{\normalsize\rmfamily\scshape\@professor}%
to
\color{headtitle}\fontfamily{ptm}\fontsize{16pt}{20pt}\selectfont\scshape\lecturenotename \\[6pt]
\fontfamily{ptm}\fontsize{24pt}{20pt}\selectfont\scshape\@topic \\[6pt]
{\normalsize\rmfamily\scshape\@professor}%
See the attached figure. [I made few other changes, of course.]

In a comment to GM's entry, @dochar mentioned the following site.
It says
If the font can be made generally available on your computer (e.g., to other word processing programs), you can use XeTeX or LuaTeX to access it directly, without any TeX-specific installation at all.
How can I do that? That is, what do I have to change in GM's above lines to use, say, Braggadocio regular, a font available in my computer?
fontspecwhich makes all the fonts available. – Marco Daniel Dec 22 '11 at 11:36fontspec. If you load the package you can create a new font face\newfontface. An example is given in the documentation offontspec(page 9). – Marco Daniel Dec 22 '11 at 13:02