How to load some code from specific location from EEprom?

I do not exactly understand what you what to achieve. After a successful upload followed by a save(), all your code is in the FlashEEPROM. Any reset / restart / power cycle will restore (some of) the machine state and, load all code into the memory, and start with onInit() or with all functions registered with E.on("init",f...);.

In case you plan something different, like a remote update of the saved code in form of a second version and you want to load it into the FlashEEPROM and switch over with a reset... that may be something else.