Connect your PC to the service connector located on the right hand side of the ADP using a null modem connection.
Using a hyperterminal session, I think the speed is 115200 and 8,N,1.
Using your COMWIN session execute a soft restart on the ADP and then switch back to the hyperterminal session immediately and hopefully you should eventually get a screen saying press ESC to display UW7 functions.
Choose option 1 for first install from SCR.
After that it's just a matter of letting the Unix install with out any further intervention which will take any thing up to 1.5 hours.
Once installed you will then have to add the necessary configuration eg LAN card settings in Unix Base Administration.
After the first install you will be forced to change the password at login.