Defining a new method (e.g. G3, CBS-RAD) in g98



Dear,
 We are using g98 on a pentium with RedHat 6.0 linux  for the calculation of
 accurate themochemical data. I would like to use models like the new
 Gaussian-3 and CBS-RAD method. These methods are a combination of several
 single point calculations. Is it possible to define new keywords, so that
 if I use the keyword G3 or CBS-RAD in the route section, g98 preforms a
 series of predefined calculations - as it now does with the G2, G2MP2 and
 CBS-like keys? Which modifications should I make in certain links in order
 to do that?
 Thanks,
 Mark Saeys
 University Gent
 Belgium