Hard to find this. Promise don't support this card anymore but I've installed this driver and it works fine.
The following files are found inside the driver download file.
|Ultra.cat||7.7 KB||16 Mar 2001|
|SMARTVSD.VXD||9.1 KB||26 Jul 2000|
|PTISTP.DLL||45.1 KB||26 Jul 2000|
|ultra.inf||8.1 KB||30 Sep 2001|
|Ultra.mpd||38.2 KB||20 Feb 2001|
|PU66VSD.VXD||8.7 KB||26 Jul 2000|