I have been asked to write scripts in WR which will be later run in Load Runner

Any tips on how i should go abt doing this
What are the things I should learn beyond doing scripting in our normal WR environment How can we make groups run in LR will that mean I have to create loops in WR and then run the iteration for each user

Frankly I am just confused how will this happen

Any help will be just tooooo gooood !!