A fix
Hey I managed to get it working here is how:
Go to the location of your ADB USB driver which you can find in your_sdk_path\usb_driver. (ex. C:\Program Files\android-sdk-windows\usb_driver)
Open up: android_winusb.inf.
Now if your on a 32 bit install of XP scroll down to the section labled [Google.NTx86], if you're on a 64-bit system scroll down to the [Google.NTamd64] section. In that that section paste in:
; HTC Incredible
%CompositeAdbInterface% = USB_Install, USB\VID_0BB4&PID_0C9E&MI_01
;
Now save the file.
Now if you plugin in the device and select that directory to install the USB driver from to install it should work. Finally go to your_sdk_path\tools. (ex. C:\Program Files\android-sdk-windows\tools) and run adb kill-server, and then adb start-server. When the server has started run adb devices and your incredible should show up.