Does it work for you? When I type the following into a command prompt:

Q:\>start "http://www.foo.com/cgi-bin/foo.cgi?a=2&b=3"
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a new console window opens, with the title http://www.foo.com/cgi-bin/foo.cgi?a=2&b=3 gets opened. This is as designed, as the start command often likely interprets the first argument as the console window title (see the help text as output by help start). OK, I admit, I didn't test it, but you should make sure what you attempt will also give the desired result.