Anything back to about 8.1.1 you can just grab the closest version of the sim and upgrade/revert from there, but 8.0.x was a formative time for the simulator. The disk layout was different, the vmdk format was different, the sysids were different, it was packaged differently, licensing, etc etc. Getting it working can be a bit more involved.
This link should still work:
http://mysupport.netapp.com/NOW/cgi-bin/simulatorlic8.cgi/download/tools/simulator/ontap/8.0.1/vsim-DOT801-7m.zip
For licenses, the 814 sheet should work. I don't have the old setup guide archived, but you can search the old posts for help.
Just remember no HA, and the hardware will have extra steps related to all the assorted firmware for disk/shelf/sp/hba, so there are limits to the simulation for things like upgrade planning.
If this post resolved your issue, help others by selecting ACCEPT AS SOLUTION or adding a KUDO.