Hi Frank,
Glad to hear that.
For using the LP_XMLConverter per se no there isn’t much, and what you will find is almost the same but with a different presentation. To tell you the truth, for a newbie it can be daunting but it isn’t that difficult.
For the details on how to use XML files for GDL creation, well there are a lot of bits and pieces distributed along many locations, such as this site, the GDL manual, forums, etc.