Recently upgraded to Enterprise CRM - now some added hopes/questions

* In a subform in quotes, if I add a "Percent" field, called Overage for instance. I would expect it to allow me to enter a percent like "10%" and carry the percent forward to formulas but it just stores it as a number like 5 not .05. Nor does it pop up like the prefilled out "Discount" field.  Is that right?  Should I not be doing this on a Friday night?

* The bigger question: If I attach files (product datasheets) to Products, is there a way to get Zoho to compile the appropriate datasheets from products in a quote or order?  Can I do this with scripting and mail merge maybe?