Thanks Wittlich. It does help me a bit, in figuring that it might be somewhat problematic. Thing is, I'm dialling in to the corporate network and then surfing out onto the Internet. 
Yeah, it's a T1+ connection, but they do insist using proxies (probably with everything other than 8080 blocked off)  
 
O dear, probably means I'll have to invest in an ISP; which, if you want a decent connection, *and* you are in the UK, is expensive... probably has to be ISDN.
Will have to settle for trouncing the AI  
 
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Nostalgia isn't what it used to be