I don´t know whether or not this has been posted already, but yesterday, toying around a bit, I found out I can make any infantry unit a phalanx unit just by adding the phalanx to the possible formations. While that itself isn´t quite that remarkable, something else is useful: This unit will automatly get the pikes in their hands (they´ll need the appropriate spearfighter animation skeleton, still), overwriting any weapon the unit might be holding. This weapon still can be used as a secondary weapon, at least I suppose so, however, no seconday weapon is strictly required for phalanxes. I tested this with the Warhammer mod spearmen.
With the attriutes long_pike or short_pike you can choose whether they should have the very long spears like levy pikemen, or short spears (really looking like spears, and about man-size). Using none will get them the medium-length pikes. The attribute "spear" doesn´t (as far as I know so far) alter the appearance, nor is it an exclusive phalanx-able attribute, but gives mount effects without having to type them out specifically.
Probalby I´ll get chewed for stating something obvious...
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