Only one small detail: I have watermarks at single gallery level and they are always displayed together other photos. How can I avoid this without use the labels.txt? You cannot get by default from configuration parameters.
Thanks and again congratulations.
The "Advanced parameters" section of the sigplus administration back-end configuration page has an entry called "Custom settings" where you can set any parameter value with a name=value syntax you could normally put directly into the activation tag, including those parameters that are not explicitly configurable with user controls on the configuration page (e.g. watermarking). As the corresponding tool-tip text points out, each parameter name and value pair should occupy a single line.