AutoCAD LT :: Matching Old Dim Styles To New Multi Leader Style On Old Dwg Files

I have recently, and reluctantly, purchased LT2012 and have learned to hate it with an unbridled passion.  I have a client that uses Acad R14dwg still and when I open their dwg files the multileader style is set to some arbitrary "standard" instead of matching the existing dimstyle of "3-16 Letters" that the file was created with.  When editing old files it makes it silly to add a leader and have to create a new multileader style with every single dwg I open.  Can it be done once and never be done again for all subsequent dwg files regardless of when they were created?  Can it be 'matched' to an existing leader that was created years ago?

For that matter, why did Autodesk pull some dimension leaders OUT of the dimstyle options at all? All dwg files are ONLY in model space, they never use layout or paper space, but that's another topic.