Custom Views clicking menuitem

Hello, I customized my sale.order adding some fields by a custom module. I need to create a new menu item which it shows the typical tree list with only this fields that I added, but I need also the form view with this new fields when I click in the row that I want to modify. I did this xml: commission.commercial.liquidacion.treesale.ordertreecommission.commercial.liquidacion.formsale.orderform

Liquidacionessale.ordertreetree,form With this xml, it appears my custom list but without search box, and I need it, and when you click on form view (not clicking on the row, but on the form icon), it appears the original view of sale.order. I don't know how link my custom form view. Somebody could help me, please? Thank you in advance.