In the window that lists all the cells (by default it shows interiors), click on the drop down menu which will list all the worldspaces. Select "Tamriel" and scroll down to the indicated cells, load them and scroll down the right list to find all the dragon perches, click edit on each one and uncheck "is full lod."
Unfortunately, SIC v7 won't be coming anytime soon. Here's a fix in the meantime. Load these exterior cells in the CK with SIC and uncheck "is full lod" for each dragon perch -AlftandExterior02 -AlftandExterior03 -BthardamzExterior04 -KagrenzelExterior03 KagrenzelExterior04 -MzulftExterior03 -ReachwindEyrieExterior01
I just got an account on this site and yeah I have an announcement Right now its feature complete, but untested. It even has its own scripts and reproccer patch. Scary! If you want to try it out pm me on the nexus.