How to move public folder from exchange 2007 to another exchange 2007 server

Pleas help, we have exchange 2007 on server 2003 SP2, all storage groups are on iSCSI LUNs from NetApp. Last Saturday, we had problem with the LUNs, we can not connect to LUNs and assign a drive letter on the exchange, I been working with Microsoft and NetApp but can not resolve this problem. So, we move the LUNs to another exchange server, by using this http://technet.microsoft.com/en-us/library/bb738132(EXCHG.80).aspx?wt.svl=overview. This works for all the user storage groups, but it doesn’t works for public folders. I already connected the LUN with public folder database to the new exchange sever, but I can not access those public folder, and can not receive email for email enabled public folder. Is there any step by step document like the link above to show me how to do this? Thank you in advance.