okay 1. notepad and task manager cannot be used to directly edit the memory of an arbitrary application running on the computer, comparing the two is definitely not valid
2. cheat engine is probably the worst thing to use if you want to actually hack in a multiplayer game as there's really nothing you can do to actually change anything important without some sort of detection finding it.
it's really only good for singleplayer games and poorly-made multiplayer games without any cheat detection. everyone and their dog detects cheat engine. but cheat engine users tend to correlate with the people who actually try to use real hacks (even though there are plenty of people who use it to just screw around in singleplayer games and don't touch multiplayer things), and "ooooo scary it has CHEAT in the name it must be bad" both contribute to the fact that it's vac banned.
3. do whatever the forget you want on a singleplayer game. cheat, hack, i don't give a forget. and guess what, neither does valve. you're not affecting anybody but your own experience and that will be reflected in the fact that you cannot be vac banned for editing your singleplayer experience.
