Tom Conlon wrote:

> Does anyone have experience of the above and can offer some tips?

There was a paper about it presented at last year's Firebird Conference:

"Full text search in Firebird without a full text search engine"
by Bjoern Reimer and Dirk Baumeister

Here's a download link:
http://www.ibphoenix.com/downloads/FirebirdConf2006/TECH-TPZ303-R/TECH-TPZ303-R.zip


--
Milan Babuskov
http://fbexport.sourceforge.net