Changing position of Columns in Writer

Our target file - writer object has a new structure where position of three columns has been changed(out of 100 plus fields), if we import the new target our existing code becomes unusable. Please suggest if there is a way to move the position of columns in writer so that we can continue to use the same ETL code. Thanks!

1) place another transformer before writer
2) Point writer to the new file (I assume that it have field names at the fist line)
3) Right click on the grid and select autoformat grid
4) Right click on thegrid and select "Autoformat grid"
5) Right click on the grid and select "Set first line as fields names"
6) Open tranformer created at the first step and perform automap
use this transformer for mapping only