Plesk 9.5 API set desktop preset for clients

[Netzhaus]

Hello,

it is possible to set the desktop preset for a certain client or domain administrator with
client_pref -u clientname -desktop-preset "client_preset"
or
domadmin -u domainname -desktop-preset "domainadmin_preset"
.

Is this possible via the API RPC?

All I figured out is how to set the admin desktop-preset, but not for a single client or domain admin.