cheers for that Chap. Tony from retro rides sent me this link aswell. I guess its the same method as you described above.
http://retrorides.proboards.com/index.cgi?action=display&board=usetharch&thread=70135&page=2#949262
http://retrorides.proboards.com/index.cgi?action=display&board=usetharch&thread=70135&page=2#949262