Maintain Range When Inserting Columns

I have a macro recorded that inserts into column E in the attached report, and then retrieves data from another worksheet in the workbook. In column D I am trying to keep a 6 month average which includes the latest inserted data, however every time I insert a column the relationship with column D is moved out by one. e.g. range E8:J8 becomes F8:K8.

I am also stuck with setting up a macro to import a new model into the report. I have set up a worksheet called new model with the manufacturer, model and fail descriptions, however all macros I have recorded fail when trying to insert the manufacturer and model into mulitple cells.