shame, in that case i would connect the dvd player to the TV using component cable and use phone cables from the DVD to the TV for the audio.
Ideally you need to buy an amp ASAP so you can take full advantage of Dolby Digital 5.1 and DTS 5.1.
I also have this dvd player so make sure you select progressive scan in the setup menu and set your TV type as NTSC. This way PAL DVD will be output as PAL and NTSC DVD will be output as NTSC
I would connect the telewest box using a fully wired scart. get a good quality one say £20-30.