The generator does not support custom feats, nor are there any plans to add that feature. What you can do is use the overrides available already, where applicable, and use CSIV and CSV to add notes for the rest (much like you would need to do if using a paper character sheet).
Didn't ask or want that as a feature. I understand I could just use a paper sheet. I have no idea what CSIV or CSV stand for. I would have figured adding a section in custom that only adds the name as as option so the sheet recognizes that a feat was taken. Anything else would just be entered text with no adjusting to the sheet. Just text like a paper sheet. Thanks for your help