Hi there peepsperns, Welcome to the forums:)
I understand you are running into a fatal error when installing your Officejet 4500 Wireless. I would like to help where I can with this problem. Could you please respond to me with which operating system you are running so I can better research the problem?
From there I will find you some steps to work with to hopefully overcome this obstacle.
Which Windows operating system am I running?
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
Thank you!
:)