thank you, i sloved my issue, i think PHP model file should have only _ in file name

i need to load model from other controller? help me?

Today i want to add new form processing controller? example: to save data on my google spreadsheet.
can i able to add new processing controller for form?
please tell me how to do it? thank man.

Sory, you can show me example ?, please.
i found common page controller in path of 'core/engine/page.php'
---------------------------------------------------
//Process disparcher in while in case we have new dispatch back
while ($dispatch_rt){
    //Process main level controller         
    // load page layout
    if ($this->layout) {
        ....
        $dispatch_rt = "common/page";   //how i can override this on each page ?
    }
    //Do the magic
    $dispatch = new ADispatcher($dispatch_rt, array("instance_id" => "0"));
    $dispatch_rt = $dispatch->dispatch();

}
---------------------------------------------------
as you see this line:  $dispatch_rt = "common/page";

how i can override this on each page ?
one more thing, what api i can check current page template? ie: is_home(), is_category()...
Thank a lot.

i don't know how to change default controller page(storefront/controller/common/page.php) in some pages for different HTML structure.
on other hand, i want to change HTML struct on to parent block (ie: column_left, column_right,...) in different page. Because i understand (controller: page.php) is for all pages in abantecart. Is that true?
Please explain me how to do it. Thank guys.