Hi Charles,
Our upgrade project from 5.5 to 6.0.1 is now 2 years old, and we haven't finished yet.
There are any number of gotchas between our versions, I can't comment on 6.1 as we're not there yet (maybe in another 2 years!).
My point is, you're asking the forum for an answer that could takes months to explain. Maybe you'll get some answers from tech support in reply to this post, but my advice would be to look into getting some IB consultants on site to help with the initial stuff, and maybe you can then take it on yourself when you're happier.
Do you have a lot of code to migrate?
Are you going white screen to white screen? Or is there blue screen code in the mix?
Have you done 6.1 training? That would help highlight to you some of the differences between versions.
Are you prepared for the time and effort required to upgrade and regression test all of your applcations?
Sorry, but there is no simple answer that I know of - I'd be very happy to hear it if there is though! Good luck with the journey.
AdeH
iWay 5.5 SMSP1 and 6.0.1 on Intel/Linux