>Just go ahead and do what ever you think is best. And if things don't go well, tell them..
>"You should've converted these app over a long time ago..."

Or tell them I know just the guy in New Orleans who would enjoy this app as much as I do <g>. How's it going?

I don't have the option of doing what I think is best but I can give them some good advice, whether they take it or not. At least I will be on record warning them the piecemeal conversion approach may be more painful than they think.