INITIO SCSI Host Bus Adapters, such as inia100u2w and ini9xxx U/UW support the FreeBSD 3.0. 
After unzipping the downloaded file, you get install1.img, kernel1.img, fcopy.exe, and this readbsd1.txt file. 
You need to make two 3.5" 1.44MB floppy diskettes from the install1.img and the kernel1.img.

Here is the procedure showing how to create the two floppy diskettes and install OS and kernel.

Say, the downloaded file is in the c:\download dir, and you have unzipped it in the same directory.  

1.  Create the installation diskette:
      a.  Insert a DOS formatted 3.5" 1.44MB floppy diskette into the drive a:
      b.  C:\download>fcopy /finstall1.img a: and mark this diskette as Installation Disk

2.  Create the kernel diskette:
      a.  Insert a DOS formatted 3.5" 1.44MB floppy diskette into the drive a:
      b.  C:\download>fcopy /fkernel1.img a: and mark this diskette as Kernel Disk

3.  Install OS:
      a.  Connect the HDD and CD-ROM to the HBA, and insert the Installation Disk and boot from it
      b.  Press <Enter> at the prompt boot:
      c.  I pick the beginner level to install and ignore the message "no disk found"
      d.  Choose the option of "Skip kernel Configuration and Continue Install"
      e.  I use entire HDD, and (q)uit
      f.  I select the option "Install the FreeBSD Boot Manager ("Booteasy") and (a)uto defaults for all and (q)uit
      g.  Install from a CDROM

4.  Install kernel:
      a.  You then see the message, "Congratulations! You now have FreeBSD installed on your system"
      b.  Hit both <ALT><F4> keys and replace the Installation Disk with the Kernel Disk
      c.  Save the old kernel to another file name, say kernel_old, just in case you may need it back later
      d.  To transfer the new kernel from the Kernel Disk, at the prompt #, key in tar xf /dev/fd0 and then press <Enter>
      e.  The prompt # comes in again and then press both <Alt><F1> keys to finish the OS installation
      f.  Take out the floppy diskette and boot the OS from the HDD, and I select the default <F1> to boot
      g.  That is all

