please, everybody, read the previous post. but if you don't want to read, here is the very short summary of the current status ... :
the IM is WORKING !!!!!! ...but in order to do so, you have to run Item manager when "HGW" is at
99% ( RIGHT BEFORE IT DISAPPEAR, about 2 second into "step 10" ): it's 100% works and i've tried it. it might need several tries but it will works

( if you get error and the game started, the fastest way to get out is
ALT + F4