Hi I have a portable dvd player which I'd like to be able to use on tvs in hotel rooms in the US/Canada. However, many hotel tvs only have an rf input and my player only has composite/svideo out. I know you can buy modulators to change composite to rf - however, are these region standard specific. In the US Tvs are NTSC - so I'd need to set my player to output NTSC. Does that mean I can only use a modulator designed for use in the US? Sorry if this is a stupid question! Any help greatly appreciated!