In order:

*Unzip "INF PACK master". 

*Then Unzip "INF PACK_Infantry1,2 and 3" in order, each time to the previously uunzipped "INF PACK master's" Infantry folder. [data/infantry].

[You built the complete "INF PACK" that will be installed into your stock game.]

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*Next...

-First, in your stock PzC "Infantry" folder, delete all Stock XMLs (also including Mraah's Pionier-with-satchel mod, if you have previously installed it). [C:/PzC/data/infantry]

-Second, drop this data folder into the main PzC folder; overwrite. (Stock files that this pack necessarily overwrites are included in their folders as stored '___stock' files; look through this inf pack's  folders, to see what I mean.)

-Next, in the "armouredunits" folder, manually delete (or remove to safe) the stock files that this mod replaces; see notepad inside "armouredunits" folder for details.

[For this INF pack, only stock "FlaK36" needs to be deleted /moved.]