So, here's the short of it...if you get lost, PM me.
When you're on the forum, and you see a HIT, instead of clicking 'Panda' or 'Once' you would click on 'Search.' Alternatively, you can click on 'details' on an existing Panda in PC, and within the 'Details' page, you can change the Panda to a requester search, by clicking on 'Search.'
The Search feature will search for and potentially accept any HITs available by the requester, as opposed to the one specific HIT group that it would usually catch. This can be useful, but can also lead to a queue full of crap that you might not want from the requester. This is where setting filters helps. Once you are in the 'Details' page of a panda in PC, you can click 'options' and this will let you set filters for what the Requester Search will accept, based on price, keywords, etc.