I understand that you are having some issues in order to configure your Slingbox PRO-HD with your CIS5039 receiver from Cisco.
As you already know, we do not have the IR Code for this specific device. As the first step, I recommend you to check this link in order to test all the available IR codes under the Cisco brand. This is the link to check:
If you are not able to control your set top box with any of the listed models, I recommend you to check the following thread, provided by alanrichey42. This is the thread to check:
Dear all that have a problem in connecting Slingbox Pro to the CISCO CIS 5030 fro TDC in Denmark.
Don't look for the CIS 5030 receievr box, but look for Tele Denmark instead of Cisco and TDC IPTV instead of CI 5030.
and it work 100%
If you use the TeleDenmark and TDC IPTV you will downloading the codes and be connected to the TDC Remote control unit. and it works