Yes it is possible. What you need to do is get the show in the USITTascii format. You can do this through showport (you download it from strands software website). After you export it through showport, you will then need to import that ascii into express off line (if you are using and expression console, if your not, this will be much harder). Save the show in express off line and that should do it for ya.
A few questions for ya before you go and do this though.... what strandconsole are you using and what ETC consoles are you using? Also, what is the nature of the show (are you using any movers, scrollers, part cues, affects, that type of thing). ASCII does very well with just strait cues, but it does not do well with part cues, moves that kind of thing.
There are company's out there that do this if you send them the showfile. If you have a very complicated show that it would cost to much to reprogram yourself and you are not getting the right results from the ascii, that could be an option.
I have a Strand 520i board. Most of the time I am trying to convert from an Obsession lighting console to the Strandconsole. I can get Showport to convert a show into the Ascii format but what I need is to go from Obsession into Strand. I can convert an ETC file into an Acsii file but that is where I get stuck because showport won't convert the file to a Strand file without errors. Then it won't work in the Strand board. Any suggestions would help.