I have convinced my mom to try her hand at making my wedding dress

.. I would like to have a detachable half skirt but we are not finding clear tutorials online or images of the methods for attaching a skirt and making it look seamless. Does anyone have any images that can be shared so that we can get an idea of how it works? I know there are different ways including a snap, hook and eye, button etc but seeing how it works will be helpful.
Re: How does the detachable train work?
Because I was going to make a prom dress for my niece with a detachable train (Project didn't end up happening because one of the vendors took forever to get the "fabric" to me)... Basically, you do it as a banded skirt where the train is self supporting wrap with a belt type finish. The other way is through hook/eyes and/or zipper. To do that you need to have commercial/industrial grade hook & eyes or zipper because that is a ton of weight caused by the pull and drag involved on a train. Yes, there are some fabrics that are light such as that which was used for Princess Diana's wedding gown, but budget becomes a consideration. The third way is just an overlay skirt with train and this will be by far the easiest of the options next to just having two dresses when it comes to DIY...
Using just the back pattern pieces and lengthening it as needed, and the waistband pieces serving as the base for the belt. It could be completely lined if you don't want any interior seams showing. I think I'd even leave the zipper opening at the back so you wouldn't have a closure at the front or sides.