The rules are same, you just have to follow them more carefully and with ot of hardwork. Basic rule of doing business are:
1. Idea ( Product/Service) & it's verification/validation
2. Customer location( any place in the world) his/her needs & what price he/she will pay to buy it.
3. What is in it for you.
Rest everything become easier. Therefore the first thing is to figure out if your idea has any need in that country?
a. You can do it in so many ways. Contact local embassy of that country and get information about the cuture, the style of living and if there is any need of your idea.
b. You can contact chamber of commerce in each major city and ask for business references to expand business. They always have contact for good people to guide you.
c. Contact your own chamber of commerce and ask if they have any relationship with cities in that country. Most chamber has relationship and give you the name to contact.
d. Check your local newspaper and see if that country people has some groups meetings. Join them and discuss the oppurtunities of doing business in their countries. Most of them love to share with you that knowledge.
e. Check US commerce depaartmen web site to see if any business activity is going on with that country on product you are thinking, if yes what companies are doing it. Get the contact information and make contact.
Now you have enough knowledge to decide if this is worth doing business or not, profit margins etc.
Prepare a business plan and do good duedeligence.
Prepare marketing plan and financial plan.
Now you are ready to present your business plan for funding or financing. Hoefully team is set and business can be started.