Sorry bruh im not on my laptop rn to know the cursor name but you can use the app greyhound to search through your bo2 files to find it
https://github.com/Scobalula/Greyhound/releases/tag/1.46.3.2
When you open it press load and find where your bo2 game is installed then go in the zone folder then all then select the file thats named base.(Some extinction name)
Then when its done type in the search box cursor it should show you a file name extract it and edit it back to original cursor and use fast iwi convertor to make it a .iwi file and place it where i said i the previous comment
https://www.itsmods.com/forum/Thread-Release-IWI-DDS-Fast-Converter-V1-40.html
For the music just download the og song from YouTube and download Black Ops II Sound Studio app and go to your bo2 folder and try to find the main menu music with it
https://github.com/master131/Black-Ops-II-Sound-Studio/releases
Once you did replace it with the YouTube one you downloaded hope it helps