Yes, I would definitely recommend setting up BootCamp for this - it's relatively painless. (It can create a new partition in the unused space on your OS X disk without erasing the disk.) The BootCamp Assistant has detailed instructions on how to go about setting up a partition and installing Windows on it, but the gist of it is that you have the BootCamp Assistant create a partition for you, then you boot from your Windows install disc and install Windows on that partition. When you've booted into Windows for the first time, pop in your OS 10.6 install disc, and it will install Apple's hardware drivers and utilities for Windows. If you got 10.6 shortly after it came out, the drivers will be version 3.0 for Windows Vista - you'll need to download version BootCamp 3.1 from the Apple support site to ensure full support for Windows 7. (If you have a newer copy of 10.6, it might have the new drivers already - I don't know, as I have an older one.)
I would, however, also recommend keeping VMWare Fusion (assuming you've already paid for it). Once Windows is set up in BootCamp, you can go into Fusion and create a virtual machine that's mapped to it (so you can also use your BootCamp installation as a virtual machine in your Mac if you don't need the full performance of booting into it natively). It should be fairly obvious how to do that - it will probably prompt you automatically. The virtualization also allows for as many different machines with as many OS's as you want - I'm running every version of Windows I've ever had in Parallels, plus a number of free OS's I'm trying out (BSD, Linux, Solaris). In short, it's a good thing to have.