If your club is using a show production program, such as CompuShow, then the job is not as bad as they think it is. Since you now have the job you need to be on really good terms with the Entry Clerk.
First thing is to find out from the entry clerk if they are using a show production program.
If they are using a Word Processor then you are going to have to really check over their work. Before you go to print then you and the entry clerk should take each entry blank and check each entry to make sure it is correct and in the right class and order in the catalog. See the discussion on catalog pages to determine the order the entries should be in. While you are at it, get out the show rules and review the sections we reference as you go this article. Also you need to go through them several times before you start putting the final catalog together.