If you are using Windows 7
Easy.. use Network..
Make a Homegroup
1. Start
2. type Homegroup
3. "Create Homegroup"
4. Change your password on your homegroup
5. save password then go to your clients (PC)
6. go to Homegroup
7. Click "Join Homegroup" and Enter the password
8. go back to your server pc.. Go to your Network
9. you can see your clients(PC)
10. now go back your clients(PC)
11. share your Local Disk.. example: Local Disk(D);
12. Right click then "Properties" then go to "Sharing" tab
13. click "Advanced Sharing"
14. Check mark "Share this folder"
15. then click on "Permission"
16. Check mark "Full Control"
17. Done!
You can now access the drives on your Clients(PC) to update the games manually on your server
Goodluck