You need 010 Editor. Download SweetScape.7z from viewtopic.php?f=59&t=828
Unpack it in .../010 Editor/Data. Open .skin file in 010 Editor, to do it, click Ctrl+ F5 and choose SKINTemplate.bt, now go to new window 'Floating Tab Group' and click 'Run on File:'nameofyourskin'.skin', and like on screenshot extend 'struct SUB submeshes', look for all ID over 65000 and change StartTriangle and nTriangle to 0.
Open skin files with 010 editor templates
Search (in each skin, 4) for submesh with id > 65000
Set StartTriangles and nTriangles to 0 for theses submeshes
[spoiler:wdjs7rsc][/spoiler:wdjs7rsc]