i have a combo box in a form from a list of customers

eg

Aston Martin
BMW
BMW
Jaguar
Jaguar

ect.

i want to remove the duplicated entries

so out of the 4 id have

Aston Martin
BMW
Jaguar

the reason for this is that there maybe more than 1 contact in any particular company.

then i want a seperate combobox with all the contacts fot the selected company in it

this will in turn fill in my form
but i think i can do that bit

hope you guys can help