There is no such thing as a silly question. I have Windows XP, Fedora 4 32 and 64 bit and Debian 3.1 on the same machine.
But think before you start. Think about partitioning (number of partitions, size). That all depends on what you need (office applications, KDE or Gnome or both).
Also think about which system to install first. I started with Windows, because it overwrites your master boot record (MBR).
Next I installed Fedora 4 with the bootloader in the MBR. I have all the following ditributions install the bootloader on a floppy, then I pick the information from the GRUB configuration file and copy it into Fedora's GRUB config file.
More info: http://www.tldp.org/HOWTO/Multiboot-with-GRUB.html
Have a lot of fun