Go here and copy and paste the fastest IP you see, they aren't great for free, but it may help. Openproxies.com
Once you see the fastest IP you can go to Tools->options->General->Connection settings and select Manual Proxy Configuration.
Make sure to select Use same proxy for all protocols.
Then put the IP you found at openproxy.com and apply. Your connection will probably be slower but it should suit you. When you want to change back just select Auto find IP and you are back to your normal connection.
Comments
if its firefox theres a nice plugin so u can even switch on the fly
Openproxies.com
Once you see the fastest IP you can go to Tools->options->General->Connection settings and select Manual Proxy Configuration.
Make sure to select Use same proxy for all protocols.
Then put the IP you found at openproxy.com and apply. Your connection will probably be slower but it should suit you. When you want to change back just select Auto find IP and you are back to your normal connection.
Later,
Alex