Can I Delete Files In My Swsetup Folder After Removing Cyberlinkdvd9

Data 2.cab (C:\SWSetup\CyberDVD\Stage1\PDIR) and

Data 1.cab (C:\SWSetup\CyberDVD\Stage1\PDIR).

My question is, can I delete these files and what’s the safest way of doing so?