Update OWA version for coexistence

I am doing an exchange 2003 to 2010 migration. There is a task that states "Copy highest 2003 and 2007 OWA version to 2010" I am not sure what that means. Can someone help me with that please. and if possible provide a step by step.
xzay1967Asked:
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jrhelgesonCommented:
What migration kit are you using?
Is this a single-server to Single-Server upgrade/migration?  Because those instructions sound like they are for a distributed environment.
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xzay1967Author Commented:
I am not using any migration kit. The set up consist of 4 mailboxes, 4 cas, and 2 hubs in one site, and 2 mailboxes, 2 hubs, and 2 cas in the DR site. Current version of exchange is 2003, plan is to migrate to 2010.
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jrhelgesonCommented:
Where did that step come from then? Because it really doesn't make any sense to me.  It seems like it might be specific to your environment, such as an internal employee link to outlook email, perhaps?
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xzay1967Author Commented:
No it has something to do with the binaries for each version of OWA.
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jrhelgesonCommented:
Binaries, as in installation source?  
What part of the installation process is it?  (pre-install, post-install, after the CAS servers?)
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xzay1967Author Commented:
No solution was given, just did not feel like going thru a long explanation. Turns out that I did not have to perform that task.
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