Download the Sengoku Faction Packs from GameFront Here!
TWC Mirror Here (consider avoiding this unless you can't get it from GameFront)
Download the Rise of the Samurai Ashikaga clan Here!
This "all clans playable" mod allows you to play as any of the minor clans from the sengoku campaign, as well as the Ashikaga clan from Rise of the Samurai. When you install one of the .pack files found in either the s2tc.7z or gempei_minors_ashikaga.7z, up to nine new factions can be selected in the clan selection menu for the respective campaign. The best bit is, you can play with these clans at any difficulty!
The s2tc.7z file provides access to each of the minors_setx.pack's detailed below. Just download the .7z file containing all the packs and extract the one you want to the data folder. I intend to start replacing each of these packs in order to make a far more polished release and to update the project to the latest startpos.
If you want more minor clans playable for Fall of the Samurai, 'Boshin: Total Domains' has you covered!
Factions found in s2tc.7z
Rise of the Samurai Packs
Unique Clan Information
Important information regarding faction packs inside "s2tc.7z"