Hi ENTIMP
I found this thread just now while searching for a way to circumvent Zune. Hopefully you have solved the problem in the meantime, otherwise, read on.
Try wp7 Transport Service from MDR Applications. The phone app costs $ 0.99, the PC app is free. They work together via USB (wired) or WiFi (home network).
Make a rule in Windows Firewall (control panel>windows firewall>advanced settings) to open port 1024 (inbound and outbound) for 'wp7 transport service'.
Also, you have to run the PC app 'as administrator'.
Find the apps at >market place>tools & productivity>transporter and at
MDR Applications
Good luck,
GJS