Dirtside powered armor

Greetings all, I recently bought a pack of NAC powered armor troops from the
Dirtside Mini's line and have a few questions before I paint them. I don't
have any of the corresponding 25 mm figures to compare them to. There are four
stands for four troops each and four stands for two troops each. There are
four figures in this pack with what I would guess are the HVAT rail guns, four
with an SAW or PPG(I), and sixteen with antipersonnel weapons. Do people mount
the weapons troops on the two figure stands? In
Dirtside, should the HVAT railgun be classified as a portable MDC-1 or
as an RFAC-1 or as an APSW? Should the PPG(I) be considered as a
separate weapon or should it be included in the increase in firepower a
powered armor stand has over a regular infantry team in Dirtside? Thanks in
advance.