How to move orders on magento 1.4.x using imp/exp profiles ?
Magento has no built in way of doing an order import export with imp/exp profiles. If you want orders from an different system imported into a different system, it means
Programmatically exporting the orders, customers, shipments, invoices, etc. from one system
Programmatically importing the orders into the new system
It's not a trivial task. If you're not up for a long learning process you'll need a developer or firm that's done it before to do it for you.
If both installations are the exact same version of Magento, you could try taking a mysqldump for all tables that start with sales_
and insert those records into your target system. The trick would be to make sure that the ID values match up across all the key relationships.
You'll need to make sure that the corresponding customers and their addresses already exist in the new system too, probably, as I imagine there would be foreign keys into those tables too.
Make sure you take lots of backups before you try that.
Good luck and please report back how it goes!
Cheers, Jonathan