Embed or import one excel workbook to other vba

I have a multiple workbooks which has columns to Workbook and I have standard a standard excel file. All i have to copy each workbook into standard template and save the template with cell D1 and re56yrsasz z  s,m`nbx   xsnww212 3peat the processes for all workbooks

Process in detail:

Say I have workbooks as 1.xslx; 2.xlsx; 3.xslx; etc., in a particular folder

and i have standard Excel template (Xlsm)

data from (specific columns) each workbook gets copied to excel template and save the template as cell d1 of workbook

how do I create a vba to do this?

I have found some help here but how can read all the excel workbooks?

http://officetricks.com/different-methods-to-import-data-from-external-excel-file/

hope I am clear