Hi Garcia,
As far as I know, you can't pass XSL to XML. XSLT hacks in your view (custom commands) can be used to sort tables and do other things but they are not recommended because sometimes they do not roundtrip when you save the form. Use the xd:preserve control to make sure they roundtrip but this renders the section not editable in the designer.
In theory, you could use Merge Forms (InfoPath's most undocumented feature) to do this when you import a form and aggregate it into the current one. That's because Merge Forms uses xslts and supports some advanced operations on the incoming data (you can convert from a separate incoming schema into your current one). I doubt this will help you though since you don't need to import data and need to change the tables in your form.
So, you either need to write a little code, or just install the free trial of qRules and use GenerateGuid. I'm guessing that will take ~20 minutes to do and you'll be off and running.
Best of luck!