Okay, while it has been established that an astrally percieving adept with multitasking still recieves the -2 DP modifier for physical actions, how does it affect spellcasting/sustaining for mystic adepts?

Since it allows you to ignore the -2 modifier for Perception while distracted and Observe in Detail as a free action, does it allow you 1 free sustained spell?

I dont really want to break this or anything, but I love this power along with Sustenance and Astral Perception, and want to make as much use out of it as possible.

I would say no since the sustaining of a spell is something that requires concentration and that's more than just distraction.

Imagine trying to balance a box on your head or wearing a shafing backpack. The first one requires concentration the other is a distraction.

Yeah, or trying to play chess without the chess board ("blindfold" game) while trying to do simple math problems at the same time. Different levels of complexity, but one requires much less concentration (for the average person) than the other.

If a sustained spell could be maintained for free as a free action, then yes. there is no language in the Multitasking adept power that lets you do anything other than Observe in Detail as a free action and get two free actions in non-combat.

hacking often has time broken down into rounds in non-combat situations actually.