Is your internet tv box an open box? A satellite set up does not have to be expensive,Get yourself a Dreambox 500HD get a dish up and do some reading here [satellites.co.uk/forums/dreambox-500-hd/] If you go for a motorised dish you will be amazed at what you can view.You can get a clone dream box 500 hd for around £150.00,80cm Dish & Lnb would be about £60.00ish Motor from Maplins around £45.00.Then your brackets and coax.Cosidering the cost of subs these days this is the way to go.Do some reading here [satellites.co.uk/forums/] and here [alsatforum.com/forum.php]
Setting up a motorised dish for the 1st time is frustrating but well worth it.If you go this route there are loads of tutorials of how to do this on the above forums
Also read up on ccam on the above forums
Polish have a habit of moving the frequencies around so the dish has to be retuned
You dont need to retune the dish,you can do whats called a blind scan on most boxes which will scan the satellite you are pointing at (Polish tv is on Hotbird13)
We have a similar set up at home and we get all Polsat has to offer ;-)