GALSync between two organization using IIFP SP2 with between Exchange 2003-2010 and Exchange 2007

Hi Team,

I would like to check if I can setup IIFP Sp2 between two trusted organization with the below setup

Organization : ABC
Exchange     : Exchange 2003 and Exchange 2010 sp2

Organization : xyz
Exchange     : Exchange 2007 Sp2

I know, IIFP will work well between Exchange 2003 and Exchange 2007 but, i could not find any information where Exchange organization is in mixed mode with exchange 2003 and exchange 2010 sp2

Thank you