►All you have to do is:
Unzip the file and put the files you got from unzipping to the scenario folder at your game directory, for example:(Win7)
Computer > Local Disk C: > Program files > Microsoft games > Age of mythology...
-Another example: (Win7)
Computer > Local Disc C: > Program files (86x) > Microsoft games > Age of mythology...
-Last example: (WinXP)
My Computer > Local Disc C: > Program files > Microsoft games > Age of mythology...
For WinVISTA i dont know anything (never used one)