FSX Air Tractor 802A COULDN'T BE INSTALLED ON FSX

After Downloading the File FSX Air Tractor 802A

File size: 706.08 kB and following the next instructions,

INSTALLATION:

1.) Copy and paste (or drag and drop) the 4 enclosed "fx" files
into your FSX "Effects" folder. (They are probably there already).

2.) Open your 802A "aircraft.cfg" file, scroll down to the [smokesystem]
coordinates, and erase them, as they do not display properly when
used in FSX.

I was unable to find the file "aircraft.cfg" file, so imposible to get the job done. Does anybady can help me out with this issue_

Thanks in advance.