'Alias' means the stuff in the panel or sound folder where the panel or sounds from another aircraft are used.
For example if your sound folder contains just a file called 'sound.cfg'

replace the text with one of the following
Here are a few handy aliases:
[fltsim]
alias=Airbus_A321\sound
[fltsim]
alias=B737_800\sound
[fltsim]
alias=Lear45\sound
[fltsim]
alias=C172\sound
[fltsim]
alias=Douglas_DC3\sound
[fltsim]
alias=Bombardier_CRJ_700\sound
[fltsim]
alias=Beech_King_Air_350\sound
[fltsim]
alias=beech_baron_58\sound
Just make sure the aircraft referred to exists in your simulator.
______________
Likewise with the panel folder (panel.cfg) - just change the
[fltsim]
alias=B737_800\sound
to
[fltsim]
alias=B737_800\panel
Simplicity is the ultimate sophistication. – Leonardo da Vinci