Copying over the bookmarks file is what I would have done in your situation, and if it works, good
Bookmarks should just be a list of internet addresses and perhaps some comments. They usually transfer between systems painlessly.
sounds like a windows "batch file", I think you can safely ignore it, it'll be windows specific.
There was no documentation that told me to do this.
That's often the case, but you have used common-sense sensibly, and it all looks OK.
Relax and enjoy linux.