[Tuner]

Actualy Universal is quite simple you just have the algorythm automticly include all parts that say Universal in the ParamXX feilds. ( I have not done this in my advanced search )

That being said I can definately help you modify Categories.tpl so it uses either a drop down list for categories or the standard categories list.
Then we can add code to add a drop-down list for Manu/Model.
You could have a seperate Manu. and Model drop down but WHY?
I would either JUST have a Model Drop Down List or Include the Manu. name and or Abreviation in front of the Models. Or we can just as easily make it with two.
Another question Would you want it to automaticly Update the categories List to show only the categories that are related to the users selected application.
Also would you like it to automaticly update the visible producs to show only the products related to the user selected application.

Scott