I have an SBLive 1024 player... and i used to switch between creatve<->kx sometimes. It can give problems but you can try. I installed my Creative drivers first(UniPack) and after that the kX drivers. Now they are both installed, but the kX is active. This will cause AudioHQ say: "no compatible device" at startup. You can switch to Creative drivers like this(WinXP): right-click My Computer->Properties->Hardware->Devicemanager->Sound video and game controllers->Right-click the kX driver(NOT the gameport!) and choose Roll back driver. If it asks for files just enter the destination folder like c:\windows\system32\ or c:\windows\system32\drivers. Now you can load AudioHQ again (and kX will say: "no compatible device" at startup). You can switch back to Kx by goign to sounds video and game controllers again and choose Update driver. Don't let Windows search but keep choosing for the "i want too choose from a list" -like options. At some point you can click "HAve Disk", click it and browse to your kX installation folder, go in to the version number folder(like 3537) and you'll see the needed inf files there. Click ok and choose the kX driver from the list.
If you want you can select what program to load on startup in start->run->msconfig32 <enter> ->startup .
This is what i did and it worked quite good. But now i'm staying with kX because they are so much cooler than creative
-Cheiz