I posted this topic in Electronics for 3 days and got no answers at all. I hope to get luckier here.

My main alarm transmitter got broken and I bought on ebay exactly the same replacement: a Viper EZSDEI489

Unfortunately the seller didn't provide any programming instructions and I am kind of lost. What do I have to do to make this remote work with my car's alarm? Do I need any additional device to program it?
Any input will be really appreciated.