DD1 files????

[Anonymous]

Hi,everybody,some time ago I downloaded a file which contained some files.
Among them,there was a file called promo.dd1 (NOT DDI).What is this?
How do I manage it.WTF can I do? :)

Hope somene can help me.
Thanx & greetx,

[EMAIL PROTECTED]
Jorge Vidal Wulff
Licenciatura en ciencia de la computacion - USACH
Universidad de Santiago de Chile
Depto. de Matematica y ciencia de la Computacion.