The production title of this episode is "Hooray for Hollywood".
According to SmallWonder.tv, there were scripts written for a fifth season and a first season of Too Good to be True but FOX decided that it was time to get rid of the show. The ratings were still good but FOX was ready to move into edgy and racy programming for their affiliates since SW was a first-run syndicated show that aired on many FOX affiliates. It is also reported that Jerry Suprian was ready to move on from the show as he felt there were other roles waiting for him (even though he has not done any TV work since the show). The fifth season could have been either without a Jamie or a "new" Jamie.
This episode was supposed to be a cross-over attempt to Vanessa's own show Too Good to Be True but the show never materialized and the parent show had run its course.