Ok, not sure what I did to get here, but, I'm in the Instal Printer dialog box and selected 'Have Disc', went to the Directrory where the Vista Drivers are, and it recognized, that there was an '.inf' file, go figure, it must be located in a '.dll' file ????, anyways, I select the DesignJET 430 (D/A1), ok and next dialog box, with printer selected and hit the 'NEXT' button and I have two dialog boxes opened, one says it's installing the printer and the smaller one says " Printer Driver Was Not Installed, the system can not find the file specified" and click on OK and I'm back to the former dialog box which tells me what driver it wants to install. Good merry-go-round......................
Went backwards, I got to this dialog box from another dialog box, Add Printer, it gives you 4 diff. options for adding, I selected, Add Printer manually and the the above occured ..........