OK, my bridge rectifier is totally wrong, that was a major mess-up. That's fixed now. Thanks Styx.
I still have a problem with setting up AC supplies though.
I've added a transformer, with the correct amount of turns on the L1 and L2, connected to an AC supply, but it's telling me that I have a voltage source loop, and only a series resistor will fix it. Once a series resistor has been added (of value 1 ohm), all is well, but no voltage originates from the supply...
Dunno, getting tired at this stage... I'll try a few online resources.
Nigel,
The reason I'm using PSpice is that I don't have a 6.4VAC transformer to hand, or a bridge rectifier for that matter. I want to learn how to use it again as it will save time in bodging circuits together...