Update tiny11maker.ps1

last corrections 
- to replace wrong command -ScratchDirectory with -Path
- putting param to the top
- make sure $Scratchdisk is $PSScriptRoot remove :\ or trailing \
- param will now have error handling for drive letters c-z and C-Z
- all references to $env:systemdrive or $($env:systemdrive) now generalized to $ScratchDisk


- tested the modified script and review log for errors

Author: Karl-WE