OK, I've taken a break for the night, I have some IRL shit to sort - I leave for Queensland around lunch tomorrow.
*edit* well whaddayaknow... changed the mapped external web resources link to the resourcecache folder, not the resources folder, and it's all working now.
In the process I have moved to a 24/7 windows server I have on my network... address is all the same, just a change in my router.
The new server is 2.2GHz AMD64 with 1GHz of RAM, and it's always on, but rarely used now I have a laptop, so welcome to the new game server folks.