포토샵 / 일러스트 CS4 버전 이용 방법 문의드립니다.

If you are asking for tutorials on using CS4 Photoshop and Illustrator, the original help documents are still available via a Google search:

https://help.adobe.com/archive/en_US/photoshop/cs4/photoshop_cs4_help.pdf 

If you are asking how to install and run CS4, support for that version ended years ago.

You can no longer install due to the activation servers are shut down.