I wouldn't trust the outriggers...not much for bracing there.

Why not spend a few bucks and rent a hoist for a day rather than modify yours, just to get it off of the pallet. Be careful of the spread between the outriggers on a rented lift. My lift will pick up my mill be at the extension it will do so, there is very little clearance between the mill and the outriggers.

In my experience, an a smooth floor with 2 people pushing, a simple bump with a crowbar will break it free from the floor and allow the machine to be slid to whatever position you want it in.