well he needs a
html version of his site. it really is that simple. at present spiders can not read flash. so he will need a
html version with a flash sniffer on it, if they detect flash it wil zip them off the the fancy site, as spiders do not have flash then will see the
html version.
then its a matter of basic
seo, keep it updated with relevant content and get loads of backlinks.
this is a good article to have a look at:
http://www.seomoz.org/article/search-ranking-factors