Removing old BB cups

If as I imagine its the old school cups with two flats on them they can be hard to get out even with the right spanner.There is a workshop tool that some shops will have that goes through from the adjustable cup side (assuming this has been removed)with a piece that tightens against the fixed cup from the outside as this is tightened it will undo the cup which is threaded the opposite way

Does that make sense?

From your description Its sounds like a fixed cup remover, (but there again what the hell do I know)

http://www.wiggle.co.uk/p/cycle/7/Cyclus_Workshop_Fixed_Cup_Tool/5360041218/

You will need to remove the adjustable cup and lockring before this can be utilised