I want to put down self stick tile in my bathroom. The floor...

I want to put down self stick tile in my bathroom. The floor is 8' X 7'. The tiles I would use are a little nicer that standard vinyl tiles, they are the kind you can grout if you would like. My worry is the floor is a chipboard, and it says not to install on that. Any advice on how to make this project work?

Thank You.