Is there software that works on the 7135 like Microsoft Streets and Trips? I am looking for software that covers the 48 US states and shows all the streets.

Check the archives. It's been covered extensively in the past......

Ah yes its been covered... I use Mapopolis..
mg

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Luck is where opportunity meets preparation.

I'll second that. I haven't examined any alternatives, but Mapopolis works excellently for me. I have my county loaded in RAM, all nearby counties on the card, and that gives me nearly every street for hundreds of miles. If I go on vacation, I drop those counties on the card as well.