Completed the rebuild of the retained database on reinstall, more thorough testing required, but as far as i can tell this closes issue [LI_32]
1. Modify uninstaller screen to clarify retaining files on uninstall
2. Modify uninstaller to keep:
a. lams database (possibly dumped into a backup file, and removed from the 'live' database)
b. content repository files (nominally in c:\lams\repository)
c. configuration files log4j.xml and server.xml
3. Modify installer to detect and use these existing files - may need to keep a registry entry when uninstalling, so that this can be checked easily.