Some answers for you.
* To load the styles, press the DISK button and make sure you are within the HD. Use the styles numeric buttons to enter the folder that has styles (eg 03). Once the styles are displayed, select they style you want and press LOAD. These will be loaded into the PATTERN area for later use.
* .SRG means this is a Single Registration file. When loaded, this file will set up your keyboard settings to perform a particular song. You can ofcourse create your own.
* A diamond shape means the folder is protected - cannot write to or erase contents of the folder.
* Yes you can load different sounds into the XD9, however you will have to purchase the Sound expansion card. This comes with the new sounds from Ketron now available. Contact your dealer for more information. These sounds can be accessed under the USER VOICE - page 2/2.
Hope this helps.