Here's a complete procefure to install Unixware 7.1.1. Please be advised that if you use this procedure, CPU must be less than 2.0GHz in order to install it successfully.
a. Download the new boot image [ptf7619c] and HBA [hba_711a.image]
b. Make two image boot disks and one HBA disk
c. Boot system the first image boot disk and follow the instructions on screen