why not just ping the site?
In windows go to RUN. Type in "cmd". then a DOS-looking window pops up. Type in the command slot "ping www.flashplayer.com". It will bring up a bunch of information, part of which is an IP address or something. Then just type in "http://" and the IP address. BAM! You go to the site. The blocker won't find the site name, and so it won't be blocked.