How do I install this thing?

[Tellos Athenaios]

That isn't the target line, you should right click the file select "Properties" and copy the target line from the screen that pops up.

[BalkanIllyrian]

That isn't the target line, you should right click the file select "Properties" and copy the target line from the screen that pops up.

Sorry

"D:\Games\Rome - Total War\RomeTW.exe" -show_error

[Tellos Athenaios]

At the end of that line, try adding:

-mod:eb