Get-ChildItem D:\Data\Load -Directory | Get-ChildItem -Filter "*.zip" | Rename-Item -NewName {$_.name -replace ' ','-' } -whatif
Get the folders, then within each folder get the ZIP files and for each ZIP file rename it.
Think of each logical step and DON'T combine them to avoid side effects!!!
Gaz
-- Stop your grinnin' and drop your linen...they're everywhere!!!