I asked our RMS vendor the following questions for your information. The answers follow each question. Let me know if this changes your quote in any way.
1. Where does the xml file need to be exported to?
It can be anywhere as long as it is accessible over http
2. I'm thinking that an every 2 hour schedule will be plenty fast enough for this shopping cart. Is that OK with your setup?
Yes. Please make sure the file is continually updates with new orders
3. Are there any other qualifications for the xml file that might need to be addressed? (multiple items on order, etc.)
As long as you have separate line items for each item in the same order, it will be ok.