I was going to wait for your answer, but then I thought you would probably already have them.(I can send the def file to you if you need it though)...Okay

1.click options-instruments-define-import

2.navigate to the directory you have your definition file.

3.click on the def file (in your case it could probably be sd1.ins) and then open. This will then display the instruments available in that particular def file.

4.Select the instrument and then okay.
Note that some instruments have a seperate file for the drums and if I remember correctly the SD series do. So this needs to be imported in a seperate operation.

5.Click close and then in the Assign window,ensure you assign all the channels to the now visible instrument. If there is a seperate drum def, you have to assign the drum channel, usually 10 to that def NOT the general instrument def.

You are now ready to use the SD in the tracks of your project.
Hope that helps,
Dennis