Products module - show two categories using checkboxes & submit button

[ukmgranger]

Is there a way to use a tickbox (or even tickbox / dropdown combo) and submit button to show products within more than one category from the products module?

If a product is associated with two categoryies (lets say 'locationSouth' & 'large'), I want the user to tick a 'locationSouth' and / or 'large' tickbox, and then click 'submit' for it to show the list of results.

Is this even possible?  I'm just not sure where to start?!?!?

Some help here would be awesome!!
Thanks in advance people