It takes just a few steps per template (Click install new, click search, scroll to template and click install now, click network enable, and repeat - attachment shows screen shots).
There are 773 templates in total, I have 35 done. Things will go very fast at first (About 10 seconds for a install), then slow a little depending on your computer speed as all 773 templates load on the same page, and you will have to keep scrolling past the installed ones. Still should be a 3-4 hour job max.
Hi there,
I've run my own website similar to this. I can get this done for you quickly, correctly and efficiently.
I will have a look and see if I can find a batch method of completing this task, if you wish.
Kind Regards,
Daniel Schulz