I only got as far as rewriting the Cordon map quest stuff before. So for a break I decided to have a go at this today and played on from where I left it which was just as i was leaving the Cordon and going through the Garbage to Agroprom. On entering Aggy it's gone like vanilla SHOC all the way through to the underground and up into the army encampment. I didn't expect that but I'm enjoying it.
Such a nice screenshot.