We have the server sorted (thank you Roy, Matt and Steve)!
The plan now is to put the various offending codes under strict version control for which Ian
had the answer. In his words;
"Depending what we want to do ... a Free version control such as Subversion may be easiest. This will also link nicely to windows world via TortoiseSVN so that it can be done cross platform. It's a bit less automatic than Microsoft solutions, but can cope with any language."
Sounds a bit geekish to me ;)
Will update on if its any use later......onwards and upwards!