Found your post trying to solve my SB Live mic issue. I have the Sound Blaster Live! 24-bit installation CD. If you still need it, let me know and I'll upload for you.
I could use a clue about the mic input. I plugged in a Logitech 600 desktop microphone to the SB Live card and nothing. Very frustrating.
I'm not sure what version I have since this computer is used. The file name i need is P16X.sys. If that's what you have, I'd love to have you upload it.
As for your issue with the mic input, I wish I could help you, but I'm not familiar with this software. Thanks for your offer!