Hi, I am using a driver for Multiple USB devices. The INF file works well for all four devices. I created a DPInst wizard to install the devices. This wizard works well on windows Vista. However on windows xp, I continually am prompted for the device driver when I switch the device to another one. What happens is this: I insert hardware A, run DPInst Installer and everything is OK. Then I insert hardware B, and am prompted for driver. I run the wizard, it replaces the old driver (with esentially the same one) and then hardware B works ok. I then insert hardware A, and I get a new prompt. I do not have a problem when I do the following: Hardware A, DPInst wizard, Hardware B, then using the Windows wizard I go to Don't search. I will choose the driver to install and the hardware always uses the same as hardware A. My question is this: How do I get DPInst to pick an existing driver? Any comments would be much appreciated.