OK, "install package" refers to the DNN install zip files. Load this into DNN through the normal method of loading DNN extensions DNN>Host>extensions. This will install all the dlls and other files that should be required for worldpay.
The setting then need to be setup like it says in the readme.txt, As for the actual setting you need I'm afraid I don't know, I never use worldpay. But usually these would be provided by the worldpay account.
The setting then need to be setup like it says in the readme.txt, As for the actual setting you need I'm afraid I don't know, I never use worldpay. But usually these would be provided by the worldpay account.