Ask them for whatever additional information they can provide about the IR signals? I'd hate to have you bombard them with technical questions like: what is the IR protocol and what are the device codes, etc as the customer service rep probably has no idea what all that stuff is.
Basically, an IR signal has 2 parts, the first part is common to all buttons, and your projector knows to look for that part in order to establish that the signal was meant for it to listen to. The second part, which is what you provided, is the button code. Once the projector recognizes that this is one of its signals, it then looks at the button code to see what you want it to do.
So, without that first part info, the button codes are useless.
Now, just to level set expectations. Even if I get that additional information, the best I can do is tell you what other devices (if any) use the same device codes so that you can try looking them up in your Roku manual. That's why Edmund (MaskedMan, TivoBurkee) referred you over here. My fear is that this device uses NEC1 with device code 0, in which case I won't be able to help you because there are literally hundreds of devices that use that.
Looks like the Amazon FireTV folks have been looking for the codes too, for over a year:
http://community.anker.com/t/infrared-r ... rs-2/63223