Light control using RF868 CC1101

Hi everyone,
i need help regarding the light control using CC1101 on 868 frequency. The lights are already connected to a receiver on this frequency, and are controlled by a remote controller.
What iam trying to accomplish is to transmit the signal using the CC1101 and Arduino UNO to the receiver.

I have about 6 receivers in my house, and my initial idea was to listen to the remote controller, store the key somewhere and then use it, or do i have to reprogramme the receivers to use new frequency? As a total noob i have no idea how to achive this.

Can anyone help me, and point me to the right direction about how to achive this, if it is even possible?

Thank you very much,