Migration from EP 5.0 to EP 6.0

Hi

We are migrating from EP 5.0 to EP 6.0 and in the process of analysis,I am having some Q's

1. Will the iviews created in EP 5.0 work in EP 6.0

2. In the java code we connect to SAP using following code

client.connect();

function = PortalUtility.createJCOFunction(client, "Z_IF_AW_DROPDOWN");

client.execute(function);

Will this JCO connectivity work.

This is because in EP 6.0 we need to do coding using BSPs(from the documents I referred),Will Jsp's work in EP6.0 or should we do coding in BSPs and alos we call RFC's in EP5.0 using the above code,Will this code work in EP5.0

Pls let us know

Thanks in advance

Regards

Aruna Chatla