I know very little about creating labels using WP, desptie the fact my system came with WordPerfect 11 installed. I never used it to create labels. Instead, I downloaded the templates I wanted from Avery, and then put them in a designated folder within My Documents. When I open the folder and double-click on the desired template, it opens in Word Perfect, where I can then type the labels. I can't promise it will work for you, but it does for me. (Scroll down this Avery page, and look for that part of the grid, which contains Word Perfect information)
A couple of other alternatives: Do a search through the, "WordPerfect Universe forum. Or try searching through "Corel's Knowledge Base". Choose WP 11 from the dropdown menu, and enter whatever you deem appropriate, in the "Search for text" field. If nothing else, it's worth looking at.
Best of luck..