If you can't put an aerial up, then you can't add Freeview to your set-up.  Freeview really does need a good rooftop aerial, unless you happen to live right underneath your local transmitter.
The closest you would get is to buy two cheap Freesat boxes and connect them to the two spare terminals on your Sky dish's LNB.
---------- Post added at 18:10 ---------- Previous post was at 18:07 ----------
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					Originally Posted by v0id  Better off getting a freesatfromsky card as you get the full suite of Five tv channels amongst others | 
	
 Not really.  Once you've 
bought the FSFS card, you still need to buy a Sky-branded box to put it in.  Then every time you fancy channel hopping up or down, you have to go via a pile of channels that show you the 'upgrade' nag screen.
Personally, I don't think it's worth the cost and inconvenience just for a couple of channels nobody watches.  Although having said that, Fiver and FiveUS will inevitably land up on Freesat sooner or later.