Is there any way to change the SIG Pro gallery layout in K2 without changing the default layout of SIG Pro.

We want a different layout in K2 to what is used on the rest of the site. The only way I found to change this is modify the code output in the item model php file.

For K2 you will have to hack the core which is really, really not advisable.

For other galleries you can simply change the "Root folder for image galleries" setting.