HI Ncedo Geza,
As Charles told it is not good idea to use versions not covered under maintenance. But there is no choice to escape from without using CMC ,if we use latest versions of Data Services.
You no need to Install the SAP BO completely. in your project you are using SAP BO then utilize the SAP BI platform.
If you are not Using SAP BO then we have to install the Information Platform Services ( IPS) .
IPS called as mini BI and it contains only required features of SAP DS and SAP Information Steward. It doesn't need license . It comes along with embedded license .
If you don't have SAP BO then best option is IPS + SAP DS.
Even if you have SAP BO also IPS+SAP DS installation on server is good recommendation.
Thanks & Regards,
Ramana.