Export / Backup Unsealed Management Packs using Powershell
Backup the customized Management Packs:
PS>
md C:\UnsealedMPBackup
Get-ManagementPack | where {$_.Sealed -eq $false} | Export-Managementpack -path C:\UnsealedMPBackup
Build a text file for all you Management Packs information (Name, Version, etc...)
Get-ManagementPack >>C:\all-mps.txt