Hi,
Thank you for responding! 
All the PSD files are located at a specific directory, something similar to "d:\documents\projects\PS"
I basically, at the moment, have 3 different files that i normally use when i edit my photographs.
First, i have a PSD called watermark.psd.
I want to be able to pool the group (just called Group 1, but i can rename if needed for the code) into my active document, because i want to preserve all the layers, adjustment layers, opacity and blending settings etc.
The same thing goes with a copyright.psd, but it only contains a layer name "Boaz Zemer" (my name). This layer has a layer style applied to it, and also opacity setting.
And a third file called signature.psd, and it just has a background layer with no special settings.
Depending on the type of photograph i'm editing, i will use one more of these PSD files. I usually open them manually into a separate window and simply pull the layer or group right into the edited photo's canvas.
I appreciate your help!
Thanks...