SOLVED: Connecting Spica memory card to PC
Still haven't figured out if there's a way to connect the phone itself, but I solved the problem of connecting the memory card THROUGH the phone. The instructions below assume that you've already installed the New PC Studio software that came with the phone.
Step 1. Using the Settings menu on your Spica, scroll down to SD Card & Phone Storage and open it. Then choose Unmount SD card.
Step 2. Plug the phone into your PC's USB port with the cable that came with the phone. You should hear some kind of notification sound from the phone when it connects.
Step 3. Look at your phone screen. In the top left corner (the so-called Notification Bar) you'll see some incomprehensible symbol and/or the USB connection icon.
Step 4. Click the hard plastic "menu" button on your phone (the top lefthand button on the fixed keypad). A popu menu will appear on the touch screen with the option to choose Notifications. Choose this.
Step 5. Click on the notification related to the USB connection, and select Mount the SD card to connect with the PC.
Now go to New PC Studio and double click on the memory card icon. You're good to go.