I swear by audiotools from www.unrelatedinventions.com, but isn't there a version of Dabbar for your pci, which is free and does the conversion on the fly? Dabbar was about the only salvation of the Psion Wavefinder.
Yes is the answer, I've just looked, www.dabbar.co.uk: support for the modular technology PCI card. I've moved on, after giving up on the Wavefinder and do all my radio recordings on freeview using DigiTV from www.nebula-electronics.com, utterly flawless and, typically, a higher bit rate, but, obviously, not the same range of stations.