How to adapt HTML templates manually?

Hi,

As per my requirement, I have to add a custom field in the SRM Url..Shopping cart (Ship-to address subscreen) . Hence I have added the field in the program (saplbbp_sc_ui_its) in the screen 310 and added the code in the corresponding HTML template(saplbbp_sc_ui_its_310)..in ITS---- BBPSC01

But still the changes are not reflecting in the SRM URL screen.

Please anyone suggest me do I need to do any more adjustments/changes other than these, as I am very much new to SRM/HTML applications.

Can anyone suggest me the steps to perform and get the above results.

thanks,

Rakesh