Thanks, that's very informative post there, the iceberg option indeed looks like the best one ...
Glad I could help! I find the search function on simple machines forums to be clunky and ineffective. Whenever someone mentions a discussion thread I don't know about, I think there's like a 5% chance I'll find the information they're talking about if they don't provide a link.
Fortunately, I had made a post in that thread, so it was really easy for me to trace back through my history and find it.