Thanks for that Mike. It confirmed the way I planned to approach the job, but I couldn't find the Standalone file anywhere.
I have SQL Server 8 Express with Tools on my computer, but when I try to install R6 from the Standalone.Zip I get the error message below - the 2nd line down baffles me because I have Win 7 Professional (64 bit) installed.
date/time         : 2014-03-19, 15:34:42, 854ms
operating system  : Windows XP Media Center x64 Service Pack 2 build 2600
program up time   : 100 milliseconds
processors        : 8x Intel(R) Xeon(R) CPU E5450 @ 3.00GHz
physical memory   : 9849/12286 MB (free/total)
free disk space   : (C:) 48.14 GB
display mode      : 1280x768, 32 bit
process id        : $86c
allocated memory  : 28.54 MB
executable        : Setup.exe
exec. date/time   : 2014-03-19 15:34
version           : 6.17.2.252
compiled with     : Delphi 7
madExcept version : 3.0n
callstack crc     : $08f4a76a, $3808d4ef, $3808d4ef
exception number  : 1
exception class   : EInOutError
exception message : Can't locate file: installSqlServer.html.