- How to recover broken supporting files in SharePoint Designer
- Custom list NewForm.aspx ruined in WSS 3.0
Unfortunately I think I had already gone to far down the line trying to ressurect it and it was beyond my skills and patience to repair it. So I exported the data from the existing list and imported it into a newly created list.
I then found a Create a Custom NewForm.aspx for a SharePoint List tutorial here which worked a treat to implement my custom changes. Looks like it all turned out ok in the end but was another fun SharePoint lesson learned the hard way.