Zts-files and don't know how to open them

[Excom]

Hi.
I have some zts-files and don't know how to open them. Is there some one that can help me?

 

[CRGreathouse]

fileext.com http://filext.com/file-extension/zts "Z-Term Script", which Google sez is a Sony desktop skin. Does any part of that makes sense?

 

[Shukie]

Doesn't ring a bell, can't find anything about it on google either.