Here's the instructions how i made it:
First of all remove all your driver from your Windows(u can keep the laptop sound driver)
You will need the creative "Installation CD for Windows Vista TM"
1. Go to Start>>Control Panel>>Programs>>(in the top of the windows there's an option named "Run programs made for previous version of Windows"
click on it.
2. There is an option with "advanced" click on it and after "next"
3.Click on "not listed" Browse then mount your CD with Vista installed mount the setup exe
4. Setup all stuff u want.
5. Download the new driver for Windows 7 x64 from Creative homepage for Creative SB live! 24bit external here's the driver i got "USB_W7DRV_LB_1_01_0099"
6. Install the driver, restart your PC and it will work i hope
I made this all by myself and it worked for me its nice and from vista CD i got 15+DB
try it maybe it work's
Sorry for my bad English post me if it was good or not.