Emu XL-7 & MP-7 User's Group

After my afternoon monster post, I went home with a Midiman 
2x2 USB Midi box to try and download OS 1.18 which is 
supposed to open a Pandora's box of wonders for my MP7.
I have a new Mac I-Book, with OS 9.2 and plenty of Ram.
After all connections and installations, and following all 
instructions, the E-Loader still won't load a damn thing. 
There is incoming Midi signal from the MP7 to the Midiman, but 
no other action is taking place. 
Somewhere I read I should install Java, and that there are two, a 
MS and a Sun one on the CD: well, on MY cd there is just a MRJ 
installer, and it won't even install, saying "MRJ CANT BE 
INSTALLED ON THIS SYSTEM. RE-INSTALL THE SYSTEM OR 
UPGRADE TO A NEWER VERSION OF TAC". 
Tac? What's Tac? What other monster quest do I have to embark 
on now?
Trying to make this behemot machine work is becoming like a 
Lord of the Rings adventure. 
Anybody has a clue?
Maybe I should mention that E-Loader doesn't seem too quick 
when launched... it also asks me for a Device ID, which I 
assume i'll leave as 0.