If you have any questions about how to formula feed your baby please have a look through the link below. There is a lot of information which covers everything from making up feeds, storing feeds to traveling with feeds (and a bit more in between!).
This link http://www.who.int/foodsafety/publications/micro/pif2007/en/index.html
is the WHO official guide to powdered formula preparation, storage etc.
If you have a specific question which you can't find an answer for here please post on the main board for advice!