Load Balancing in Report Server

I'm running Reports 6.0 and OAS 4.0.8 and am using client/server legacy forms & reports. I'm calling reports (with parameter file) from a form. I'm calling the form using show.web_product and paramform=html.
My problem is that I can't get the server queue to accept more than 1 job at a time. The load balancing features of OAS/Reports means that there has to be at least 20 or so reports queueing (source - Oracle Support) before a new engine will switch in - even if you specified more than one minimum at start-up. If a report is running everybody has to wait for it to finish. That includes those waiting for the parameter screen as this has to be created by the report server as well.
As we are running an intranet with less than 300 users it's unlikely that we are going to get the throughput. I've tried saturating the queue with small scheduled jobs (which do invoke new engines) but these engines disappear as soon as the job is finished.
The only work round is to recreate the parameter forms in a web form. Something that is going to take a lot of effort given the number of reports that already have parameter forms.
Has anybody else come across this? You can't all be General Motors or BP..

You can read this Link:[http://download.oracle.com/docs/cd/E12839_01/bi.1111/b32121/pbr_arch003.htm]
Hope it helps
Greetings

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