1 MILLION VIEWS WOW!!!!! THANKS EVERYONE!!! You might also want to see Handheld [Portal] Rocket Sentry: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_-AIcm6nSsE.html
Does it spawn in the GLaDos Boss room? If not, I might be able to help. I did something similar to this, it couldn't aim or fire, but it worked with the boss and other portal maps.