patto
1
%FILE_NAME% which would be the xrns filename minus the “.xrns” part
I suggested this in the Beta stage too. +1 from me 
EDIT: Found the link. Also suggested a check-box to save the render in same location as the project file.
patto
3
Sorry for missing that one.
Foo
4
Agreed. Also, see this thread for other related rendering suggestions: Render To Disk Evolution