Upgrading Portal 7.3 – and work ESS/MSS

Dear experts

I am with a project of upgrade portal of 701 to 7.3. However the customer not want update the appplications current.

We are working ECC 6.0 with eph 6. Portal 701.

I am checking this blog: and apply option 1.

http://scn.sap.com/community/netweaver-portal/migration-and-upgrade/blog/2013/01/09/upgrading-to-nw-portal-73-what-to-do-with-essmss

I know that for that the applications of ESS&MSS 1.41 work with SAP NW 7.3 I have that install the  new re-compiled Java packages for NW 7.3 are called ESS 633, MSS 630, PCUI_GP 633.

I have applications as E-Recruiting, LSO, ESS&MSS

My questions are:

If I use the same role that I have in this moment the applications will work fine ?

What is proccess of migrate the roles, iview, page, workset created in portal 701 to 7.3?

Thanks in adavance

Regards