Script simply renames files as named by postcardscansimple.exe to an almalgamated version of it's BermanID.

renamer.ps1

Param(
    [Parameter(Mandatory=$true)][string]$binder = $null
)
write-host renner started
Get-ChildItem  -Filter *.bmp | 
    Foreach-Object {
    # $origName = $_.FullName -replace 'f', '-front'
    if ($_.BaseName -match '^[0-9]*[f|b]$') {
        if ($_.BaseName -match 'f') {
            $side = 'front'
        }
        else {
            $side = 'back'
        }
        $origNum = [int]($_.BaseName -replace '[f|b]', '')
        # Write-Host $origNum
        $bottomID = (3 * $origNum).ToString("000")
        $middleID = (3 * $origNum - 1).ToString("000")
        $topID = (3 * $origNum - 2).ToString("000")
        #$binder = $_.DirectoryName -replace '^.*\\(.*)$', '$1'
        Write-Host Renaming $_.FullName to B$binder-$topID-$middleID-$bottomID-$side.bmp
        & Rename-Item $_.FullName B$binder-$topID-$middleID-$bottomID-$side.bmp
    }

}