You cant edit health over the max value, because it´s hardcoded into the game. God-Mode and Stamina-regen is possible, but only in offline mode....
There are 4 big Boss Souls, you need all 4 to progress further. When you´ve cleared -iron keep -sinners rise -black gulch -cardinal tower you can...
Did you want to go back to level 1 or what?
But remember, you have to extract the User_Data01 file to edit. And there´s a checksum on it that gets fucked up after editing so you need to fix...
Just use a Hexeditor and the ID-List I posted. Faraam Armor is Faraam Helm Head 014551A4 Faraam Armor Chest 014551A5 Faraam Gauntlets Hands...
Separate names with a comma.