Because our desktop computer died several days ago, I was obviously unable to deactivate Photoshop 6. Once I get the new desktop, how do I go about re-installing it?
You can activate on up to 2 computers. If you have not used up the second activation, you can go ahead and install/activate on the new one and call Customer Service to release or reset your activations.
http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivation-products.html
CS6 installers are here:
http://helpx.adobe.com/x-productkb/policy-pricing/cs6-product-downloads.html
Have your serial number ready.
Gene