Here is how to get the drivers to work on a 64-bit computer.
Windows Vista x64 and Windows 7 x64 (mine Windows 7 x64):
1. Install New Samsung PC Studio (you will have problems with USB drivers installation, skip them)
2. Connect your phone.
3. Open Device Manager.
4. Right click and Update Drivers on any unrecognized device (choose search for drivers or w/e [not online])
5. Then Choose the pc studio installation folder
6. Then let it update the drivers...
7. Windows will recognize Samsung USB Composite Device (or something like this)
8. Then after Installing refresh the Device Manager and there will be another Unknown Device.
9. repeat step 4-5 on the new unrecognized device
10. After that windows will recognize Samsung Modem (or something like that). New Pc Studio will then automatically start and connect to your phone, it give an error but it works perfectly!!!!
I hope this helps!!!