Hello Techwomantoo,
I am not sure if you are looking for this one, but you can refer to http://help.adobe.com/en_US/ColdFusion/9.0/Installing/WSc3ff6d0ea77859 461172e0811cdec18c28-7ffc.html to change the built-in port.
Please let us know, if this doesn't help.
Regards,
Anit Kumar