@Frankthesurvival If you created a picture using Corel software, would you be allowed to give people a version of the Corel software so they could view it? The answer of course is no. I create images in Photoshop but I can't include a version of Photoshop for people to install to view any images I send them. Well I could but I would probably end up in jail with a bunch of nasty women.
It's only the same as people who do paintjobs for vehicles, they are not allowed to include the vehicle model in their mod.
As @Reacon says, put in your mod description "Requirements: Must have Simple Zombies installed for this mod to work" and provide a link to that mod. Then remove the zombies mod files from your download. That's all you need to do and then you can get your mod approved.