STEPS INVOLVE IN BI7 PLZ

HI

I am working first time in the BI 7 n i dont know to the data flow in it. i am unable to perform a single load by creating my own obj even thru flat file. plzzzzzzzzz any body help me by providing the documents that involve in the BI7 like whether i need to perform Infopackage first r Transformation r DTP i am unable to differentiate which cums first n what happen to the load so plzzzz provide me step by step process in BI7

Thanx in Advance

Priya .k