PowerShell script to copy and rename log files

I have a script written for copying our BES-5 log files to a compliance software package. I need help modifying this script to work with the log files BES-10 produces. Currently our logs look like this:

smslog_yyyymmdd.csv
pinlog_yyyymmdd.csv
PhoneCallLog_yyyymmdd.csv

This is the naming convention our compliance software wants it in.... BUT our new log files look like this:

New BES-10 logs:
BES-10_sms_1.0_20150102_0001.csv
BES-10_Phone_1.0_20150102_0001.csv
BES-10_bbmmessage_1.0_20150102_0001.csv

So in short I need this:
BES-10_sms_1.0_20150102_0001.csv ---> smslog_20150104.csv then copied to a queue folder and an archive folder renaming the file to:
BES-10_smslog_20150104.processed

Here is the code that works with our BES-5 environment:

$emailServer = 'email_server_address' #smtp server
$yesterday = (get-date).AddDays(-1)
$yesterdayString = $yesterday.tostring('yyyyMMdd')
$datepath = $yesterday.ToString('yyyy\\MM\\dd')
$pathVal = "Z:\$yesterdayString"
$archivePath = "D:\Scripttest\BBlogs\archive\$datepath"
$smsfile="smslog_$yesterdayString.csv"
$pinfile="pinlog_$yesterdayString.csv"
$phoneFile="PhoneCallLog_$yesterdayString.csv"

if (-not (test-path $archivePath)) {mkdir $archivePath}

foreach ($file in ('smslog','pinlog','PhoneCallLog')) {
    $source = "$pathval\$($file)_$yesterdayString.csv"
    $targets = "D:\Scripttest\BBlogs\queue\$($file)_$yesterdayString.csv","$archivePath\$($file)_$yesterdayString.processed"
    foreach ($target in $targets) {
#write-host "Copying $source to $target"
        copy-item -Path $source -Destination $target -ErrorAction SilentlyContinue
        if (-not (Test-Path $target)) {$failure += 1} else {write-host "Copy successful"}
    }
}

$msg = "SUCCEEDED" ; $priority = 'normal'
if ($failure -gt 1) { $msg = "FAILED" ; $priority = 'high'} 

Send-MailMessage -SmtpServer $emailServer -To alerts@domain.com -From alerts@domain.com  -Subject "BESLOG's Transfer to ZL : $msg " -Body  "BESLOG's Transfer $msg"  -Priority $priority

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