1. unzip the contents of the an124.zip into an 
separate folder on your hard drive.
2. copy/paste the an124 folder into your .../FS9/aircraft/
subfolder.
3. thats it.

this one comes with default 747 panel and 737 sound. i higly recommend
to use an antonov an124 panel like
antonov-124.zip (avsim.com)

the aircraft has a maximum take off weight of 402 metrical tons.
you cannot takeoff with full tanks AND full cargo load of 150 tons.
"usual" animations
all control surfaces, gear, nose door loading, pax door,... 
"unusual" animations (for which you have to assign keys to) are:
WINGFOLD: opens/closes all upper deck pax doors
CONCORDE NOSE: opens/closes engine cowlings
TAILHOOK: opens/closes rear cargo ramp
WATER RUDDER: opens/closes upper and cargo deck emergency exits

freewarerepaints and freewaremodifications of this package are higly 
welcome and dont need a special permission. see the copyright.txt.
i will upload a paintkit 
soon.