Import Multiple PST's into one mailbox

Hi,

I have multiple PST files with different names that I need to import into a single mailbox using Exchange 2010.

I think I've come up with a script but not sure if it'll work, could someone check for me please or suggest a better method?

Dir \\Server\PST_Files\*.pst | %{ New-MailboxImportRequest -Name BulkPSTImport -BatchName MassImport -Mailbox MYPSTImportMAILBOX}

Thanks