Will installing Mac os X Leopard 10.5 mess up my windows 7?

I currently have Windows 7 Ultimate 32-bit and I want to install Mac OS X Leopard 10.5 on another drive ( I got 5 drives all 95GB each ) and I want to know if installing Mac OS X Leopard 10.5 will mess up my Windows 7 Ultimate boot.ini because last time I installed Windows XP on the same computer and it wouldn't boot up Windows 7. I tried a lot of things but nothing helped so I had to reinstall Windows 7. I would appreciate any answers. Thanks.