Got me a new processor, not a top of the line by any means - an Intel Quad Core 6600 for around £140 and it flys (relative to my old Athlon FX60) at Poser renders - this rendered in Firefly in Poser 7 at final settings in 45 seconds (Windows Vista SP1) Not a particularly taxing scene, but animation is at last a real dream :-))
Full system now - Asus K5 with Quad Core 6600 - 4GB DDR II 800 RAM, Radeon HD3850 , WIndows VIsta SP1.