My suggestion is to draw out the workflow the way you want it on paper and then write the XML by hand. It's not nearly as daunting as it sounds, so long as you have a plan in advance. It's also fairly easy to integrate it into an already existing workflow, just don't forget to add the original module name and a period when referencing external ID fields from other modules.

The end result is generally cleaner, you'll have a better understanding of OpenERP as a whole, and most importantly it'll probably take less time overall than trying to get a workflow export system to work in 7.0.