>>776
xxx_のシートをMDBの後ろに並べたいってことでいいんかね？

$book.Sheets[$book.Sheets.Count..1] | where { $_.name -like "xxx_*" } | foreach {
$_.move([Reflection.Missing]::Value, $book.Sheets("MDB"))
$_.name = $_.name -replace "^xxx_","yy_"
$_.OLEObjects("CBT1").Enabled = $false
}