Hung is a long and deep river with many tributaries.

Some schools have only what are referred to as the pillar sets, other schools have much more supplimental materials as well as forms and each school, each practitioner expresses these in a different way.

essence is there, sameness is not.

the pillars are generally recognized as:

Gung ji fook fu kuen (tame the tiger)
Fu hok seung ying kuen (tiger/crane)
Sap Ying Kuen or Ng Ying Kuen (10 shapes or 5 animals some schools use one or the other as a pillar set)
Tid sen Kuen (Iron thread)

Other sets such as 2 man matching sets, and other entirely different sets will be inside the system depending on who your teacher is. I think it is gung ji fook fu kuen that is consistently recognized as containing the oldest material directly related to the tiger style drawn from the shaolin temple of old.

It's worth reading the material posted as links here though so as to get an understanding of just how deep and how long the style is.