Hi,
Been developing in C# for 6+ years. Not actually done this before but looked up some code and it seems fairly straight forward. I can do this for you for £30 assuming you just want it as simple as you describe. Run the script, Press a button, it then adds all the bookmarks. Shouldn't take very long at all, can complete in 1 day. Is this like a list of bookmarks you want to add to multiple machines or something?
Regards
Ant