In my experience always install Windows as first OS. Otherwise it will overwrite the boot loader of the previously installed OS. There are ways around it, but these just make it more complicated.
After installing Windows, install your first Linux distribution. It normally will find your Windows installation and add it to its boot loader automatically so you can dual boot with windows and Linux.
Now comes the third Linux distribution. Some distributions find other distributions and will add them to their boot loader (I don't know for sure about SUSE and Red Hat). Just try it during your installation. When all OSes are recognized install the boot loader of your third OS, otherwise boot into your first Linux distribution and add the second one manually to the boot loader. As the type and version of the boot loader depend on the distribution I can't tell you how to do it, but you'll find some good tutorials in the net.