It's not possible then. If you installed an add-on that required template edits, then when you change to a new style you will need to manually edit everything you previously edited on the other styles.
Why don't you go to the products page on your AdminCP and get all the names ( the ones that required template edits ) then you search them here in vb.org and see the instructions of how to install. Most of the mods that are here vb.org require very simple template modifications..