Paths: Installation, Directory and Start of Chivalry regarding RTW Gold or Era's Pack Versions (both versions are patched to RTW 1.5 and BI 1.6 already, but check it out via the Options menu first)
The install target path is here by default:
C:\Program Files\The Creative Assembly\Rome - Total War
The completed directory path is here then by default: (after the installation)
C:\Program Files\The Creative Assembly\Rome - Total War\chivalry
The shortcut-path is here by default:
"C:\Program Files\The Creative Assembly\Rome - Total War\RomeTW.exe" -show_err -nm -mod:chivalry
(first line)
and
C:\Program Files\The Creative Assembly\Rome - Total War
(second line)