It appears to be for Aiko 4 but it's asking for a slew of files in the folder:

RuntimeLibrariesCharacterRox

e.g. injFBMA4AikoBody-abdomen.pz2

Where are those supposed to come from? I have A4 installed but not those files. I'm guessing you need to distribute those as well? Also, those usually seem to go directly under libraries ather than in characters. BUT, I know virtually nothing about inj other than how to double click one :-) Someone should be along shortly to get it sorted out for you.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken