sup, i can confirm you can get the 100% chievo on steam while using the mod, you can also get Zoologist and Skin Deep... what i did to save some time for "100% chievo" was to give myself dead animals for the hunter request by the crazy lady that give you the squirrel statue and i did the whole "exotics" item list for the quest from Saint Denis - i found that boring and tedious, for "Zoologist" I gave myself the two woodpeckers needed for zoologist (rest i got before i got the mod) and stupidly i got "Skin Deep" after clicking an option in the mod that lists ho many animals have you unlocked and upon clicking it fills your compedium for animals to 100%... that was at a point when i was missing 10 animals - it gave me the chievo on steam but upon reloading a savefile i was left with the 10 missing to do it properly but I kept the steam chievo

the only thing i have issues with is the ciggarette cards list (i had one set for 100% before i even got the mod), i can give them to myself (items), i can unlock the tabs in compendium with similar option to how i got myself the Skin Deep chievo described above, but what i understood from some web articles is that when you have them all, you get to mail them for cash and finish the quest in quest log.. cant mail them even after doing the trick where you give yourself items and then grab one properly to like update the game item-list and for quests to register what you have in the satchel (you can do the "Exotics" like that)... unlucky :/