buffalo terastation - doesn't allow special charac

I just bought a buffalo terastation NAS to use with my Sonos. (So I don't have to have the computer turned on to access my music library)
I already have a 2tb lacie drive full of music that I want to copy to the Buffalo. Problem is, it won't allow "special characters" such as / and * , which I have thousands of in my song names.
I tried using the apple script "replace text in item names" and thought for sure I had solved the problem, by telling it to change all / to .
It didn't work. I got two beeps. (I think this is apple speak for TOO MANY FILES perhaps?) There are about 24000 (uncompressed) songs, but hell, if this thing really does millions of operations per second, it would seem that changing a couple thousand /s to .'s would not be so hard.

Please help! Any ideas would be greatly appreciated.
JK