This is a problem that can be solved for somewhere between $40 and free. Probably both.
As you've already figured out, you need some way for your drive architectures to speak to each other. Here are the solutions.
IMPORTANT: If you are going to work with video or other large files on both platforms, you need these. No getting around them.
For Mac to PC: MacFuse allows you to mount NTFS drives on your Mac. It's free, and easy to use. You can find it
here. Ignore all the developer stuff. Just install the DMG, and it works.
Note that IT DOES NOT WORK WITH SNOW LEOPARD. It's also not commercial software (it's Open Source), so any issues take a long time to fix.
That said, I've been using it on Leopard for a couple of years with no issues. It works. I don't even know it's there.
There's a commercial solution that you may find more helpful: a real company to turn to for support, and regular updates: Paragon Software
NTFS for Mac. $40, seamless. You'll never know it's there.
For PC to Mac: MediaFour
MacDrive. It costs more at the developer website, but available for $40 at all the online stores.
Also, absolutely seamless, precisely zero issues.
I use both, and wouldn't want to live without them.
Tim Wilson
Creative Cow Magazine!
My Blog:
"Is this thing on? Oh it's on!"