Ok, I figured it out myself. I edited Pipins Extratab1 in such a way that it does what I want (including fixing his original mistake). I also got it to show in the first tab. And renamed some things to _2 instead of _first. It's the second extra tab after all, not the first. Also the product name itself to comply more with the second profile fields page product.
If anyone is interested, I attached the product to this post.
For those looking for the extra profile fields page product to go with this:
https://vborg.vbsupport.ru/showpost....&postcount=134
Walrick