Batch Programming help

Hi
I am wanting to make program that once active loads a batch file that has a list of URLS that are to be loaded. These URLs will change from time to time.

I have made to .bat files one called URLLoader.bat which is the program and one called URLlist.bat which has a list of URL's.

This is what i have so far in the URLLoader.bat

set /p answer=do you want to import and download the URL list? [y/n]

if "%answer%"=='y' (
Call URLlist.bat
)

I am kinda stuck where to go now. I want it to load this bat file and it will open the pages. If the batch file does not exist then I want it to say so.

Thanks very much for your help