[Samba] Any way to make copies over samba work like 'cp -p' ?

[Leon Out]

I'm having a problem when copying a particular samba-shared directory. 
The dir contains some folders which are world-writable, but the 
top-level dir is not world-writable. The "directory mode" is set to 
2775 (the 2 is for set-gid). When I copy this folder, all of the new 
folders are 2775, instead of 2777. Is there any way to make this copy 
behave like 'cp -p', where the attributes of each file are preserved?

Thanks!