what do you mean nothing happen ? starting as_setup.tos should at least show a message or an error, otherwise there is something wrong with your emulation setup
Ok, it works now. Sorry for all the pain. The installation procedure is also much more straightforward than I thought! I assumed I had to unpack the files BEFORE lauching as_setup, when actually it's as_setup which unpacks them! Once everything unpacked fine, the game ran immediately.