What you are trying to do shouldn't be all that difficult. The first thing you need is a DVI to composite video adapter. There are plenty of them on ebay, or are available through the Apple Store. I'm not sure if Apple had a PAL version of this adapter or if they were all NTSC. To be safe go to the US version of ebay or the Apple Store to get one. Second thing you need would be an RF modulator, also an NTSC version. There were a couple different inexpensive models sold by RadioShack here in the states, they are pretty common and easy to find.
Here's a link to the DVI to composite adapter:
http://store.apple.com/us/product/M9267G/A
and here is an RF modulator:
http://www.radioshack.com/product/in...uctId=2103095#