They say that your chances of getting into a good university is greater if you transfer from a comm. college?

I'm not sure what you mean by "your chances are greater." You don't necessarily improve your chances of attending a university by going to a community college, unless there are serious reasons you need to improve upon your academic record from high school. If that's true, your best bet would be to attend a community college in the area of the school you wish to attend, get very very good grades, make contacts with the admissions of the school and find out how you can eventually transfer.