To add the product cross sell feature to your product template to be displayed on your more information page, you would need to add code into 2 sections in the product template. You would need to setup the [-- DEFINE PRODUCT_CROSS_SELL --] section so that it is setup similar to the [-- DEFINE PRODUCT --] section in the product template (see product template guidelines for more information).
After you have setup the DEFINE PRODUCT_CROSS_SELL section in your template you can add the code and tags to display the product cross sell items on your more information page.
Find in your DEFINE MORE_INFO_PAGE section of your template where you would like to have these cross sell products be displayed. You would setup the code similar to the following.