Don't know with Tinyeditor but with FCKeditor it is possible : you get one button to insert a "mask" (in french : un masque de saisie)
- you just have to write your masks (unlimited) in fckeditor/fcktemplates-xoops.xml - then user can choose wich mask to insert (and you can help him to choose by insert little thumb for each mask)
Hope its help (if you want an example, I send you a PM)
I don't believe that paypal would be agree to secure payment without compensation... so if I'm not wrong :
- you have to create an account to pay with paypal - your credit card is the only thing you need to create an account (left side on the screenshot before)