How do i load and "reload" savestate

How do i do this in v5.2

I guess you need to manually copy the savestate.sor file, which is located inside the savegame folder of the game (this folder is created on the first run of the game's executable).
Note that the file gets edited/deleted by the game everytime you change scenes or if you quit the game, so you should make a copy of it right after the scene begins play -- just pause the game, go to the folder, copy the file and then resume normal play.

A tip: in this same fashion, the Screens of Rage screenshots are stored in the savegame folder.