Is PringMig a group? If so this should work.
 Code:
If InGroup("PrintMig")
   If Not Exist("C:\logfile\*.*")
      MD "C:\logfile"
   Endif

   Copy "I:\PrintMig\*.*" "C:\logfile\*.*"

   Shell "C:\logfile\Printmig330a.exe /all"
Endif

As for the placement, it's totally up to you. As long as it's after that I: mapping. After that final T mapping would be fine.