DC SD Card Reader and DS4

Explaining how to put the 10-12 retail games that have said to work with sd card reader on, by changing and how to exactly, altering readme files, ip bins, etc?

How to get the dciso emu like SegaGen emu to actually run on it ?

How to get beats of rage homebrews to work off it.

If you install ds4, will it overwrite your dc o/s or should you use it as a cd-r app only?

Seriously many people ask, but the info is limited or confusing so if anybody knows a little about sd card reader can you please make a short video tutorial explaining it for me and others ?