Hello and welcome to the forums.
shagproductionz wrote:When i choose the path of my installed instruments in sampletanks preferences it only loads the sequences and multi (demo) but no instruments.
Do you mean that the Sampletank browser doesn't show any instrument presets or that the presets are there but when you choose one it doesn't generate any sounds?
You can check to see that the content has been loaded correctly by looking in your folder structure and following your path ExternalHD/Sounds/IK Multimedia/SampleTank 3 in the Finder, you should then be able to see a folder called 'Instruments' which contain the presets and a folder called 'Samples' which contain the main content for the sound sets. If installed correctly here, Sampletank should not be having a problem opening them.
If they are installed correctly, I would suggest opening a support ticket with IK Support as they will be able to give you some one to one guidance
http://www.ikmultimedia.com/contact-support/mi/ This forum is for users and others may not have had the same issues as you, so you may not get any answers here.
You say you are trying to load from DVDs. AFAIK SampleTank is not available on DVD, only download and USB drives. Are these backup discs you have made from downloaded content? Could they be corrupted which may be causing the errors?