Well, I have just answered my own question. Yahoo Messenger 9 (YM9) wouldn't work in Win98Se even with KernelEX RC2. Whenever I tried installing YM9, a Windows installer message box would first pop-up informing me about a "wrong path" or something like that (Sorry, I wasn't able to write it down). But then, I would click on "OK" then installation would continue but, it will then inform me that the YUI.dll is linked to a missing Shell32.dll: SHCreateDirectory.Exw (yeah, this one, I was able to write down), hence, YM9 won't run. I tried to use the Kernel compatibility tab but it still won't work. Don't know if I missed something in the whole process or this really needs some fixing from Xeno. Anyway Xeno, hope you can look into this. Thanks!