You go here, http://www-01.ibm.com/support/docview.w ... wg27036733
, and read this: Migration Guide.
I'm sure that IBM are assisting in your upgrade. If you have further questions, there will certainly be some team at your site working on this, and anything they can't handle they will pass on to IBM, or tell you how to do that. Other than that, you hire a consultant. If working remotely is OK, let me know