Power Supplyin parallel
Short answer: no.  Power supplies designed for paralleling generally have a separate signal wire that goes between the (usually identical) units to coordinate output voltages and so forth.  If there is no communication between the units, one of them will end up trying to force current into the other one due to voltage differences.  Even if you have them adjusted to identical voltages at no load, they will droop at different rates as you draw more current and there you are.