Apparently you missed the very first post in the thread.
M4-78 is not part of TSLRCM - not in any version.
Several items such as the cut GenoHaradan quest, Disciple's Holocron quest, and M4-78 have many files but not enough content. Attempting to put them in without creating some new material to make it work brings those quests out of the realm of restoration (TSLRCM's goal) but into another area entirely. Some folks are willing to put up with fan created material in order to see these files in the game. (I should know - I'm the voice of M4-78 in Darth Stoney's version of the mod, for crying out loud.)
These sort of things will be released here (and probably elsewhere to boot) as unofficial add-ons. As many of the folks developing these side projects are members here, you'll find that once finished many of them will be compatible with M4-78. Stoney's current version of M4-78 is not compatible but there was always plans to expand it anyway. Zbyl has taken over the duties of the expansion of the M4-78 (called the M4-78 Enhancement Project) and hopefully will make announcements soon on what he has in store for us.
As for Darth Shan's version, I don't know how nice it plays with others. As I stick with Stoney's version, I don't know that much about it. However some quick research brings up the following:
As we all know from reading the first post , Handmaiden for Females doesn't work with TSLRCM so that's not a reason not to download the mod. However, you'll miss out on using Deathdisco's Coruscant mod which is rather popular. Those that have attempted to play through with Darth Shan's version are invited to comment here but only on compatibility issues. (I don't want this thread being highjacked by M4-78 discussions nor turning the thread into a flame war.)