Hi,
You need to contact your local microsoft regional service center to merge it all together.
http://www.microsoft.com/learning/en/us/help.aspx#fbid=qQD20Z_1CoB
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MCSE:Server Infrastructure, MCSE:Desktop Infrastructure, MCSA Server 2012, Citrix CCIA & CCEE, Cisco CCNA, VMware VCP 3/4/5 Twitter: @dnyvandam http://www.dannyvandam.net