SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

I am in the process of installing an ingroud pool. My sprinkler system was pulled up during the digging. It was expected. They have just poured the foundation for the walls and the pool co. told me that most customers lay the sprinkler lines over the foundation. All of the sprinkler co's want to wait until the pool is finished to reinstall the lines.(My lawn can't wait another three weeks) I am an avid DIY and can easily attach the lines and clamp them down. What should I do, wait and pay or go ahead and DIMyself and put the lines over the foundation. The only problem I see is that the concrete walk aroung the pool will be over the lines and any future problems would be difficult to get to.