The description in your homepage for a dualboot systems is very bad. The best way for beginners is to use both Windows XP and (Suse) Linux is to use the win-bootloader.
Have a look at the offical SuSEFAQ and you will learn some more about dualboot systems. The easiest way to combine Linux and Windows is to install Linux on the root partition and build an imagefile for Windows. You can copy and paste this file in a Windows directory and add it to the bootlist in the boot.ini. And if you want to write into the Windows partition, just use a third-party tool like partition magic and you have a FAT32 system. Most of the MS user never use only one feature of NTFS! If you need NTFS, just create a new, small FAT32 partition. And it does'nt matter, whether you use Windows or Linux to do this job. It's so easy!