turn off SEF for wrapper?

that's unfortunately way beyond my skill set... Had a quick look around but found mostly mambo related stuff, and given things have moved on a bit since, I would have no clue about making sure all is as it should be .... am using joomla 1.0.13...

A component built for Mambo 4.5 would work just as well.

I just come to think of a way you could input custom parameters in a component: use a query string.

For example, instead of having a link like:
sefRelToAbs("index.php?option=com_wrapper&task=view&Itemid=32&trid=145&tr=Bellingham-to-Bridport&un=northy");
do this:
sefRelToAbs("index.php?option=com_wrapper&task=view&Itemid=32")."?trid=145&tr=Bellingham-to-Bridport&un=northy";
It will give you the URL like:
www.4x4earth.com.au/wrapper/?trid=145&tr...o-Bridport&un=northy

The parameters from the query string will now be passed to the component and registered as GET variables as usual.