As rediculous as it sounds, the advice you've been given is as good as it gets.
I've maintained since its introduction that there's nothing very intelligent about IDR, and it's situations like that that we see why.
The manual process, in my testing, doesn't take any longer. IDR in fact, is basically a wizard which guides you through it.
If you've inherited this role, you will learn a lot more about it by doing a manual restore. Then update your documentation, stating that you'll always do it that way in future. You'll never have another restore issue.