BI 7.0 data loading from flat file

HI BW gurus,

I have been working in SAP BW 3.5 and I am new to BI 7.0. I am trying to load data from flat file to BW. As the navigation is different i am unable to deliver. I read the help also but confusing. If some one knows please send the step to step procedure with screen shots of how to load data into BW using 7.0.

I will assign you with full points