Security :: Trying To Store Users Full Name And Other Data?

this is the ecenario, we're developing a web application in vb.net using vwd 05, and everthing has been great so far, we've recevied a lot ideas from the guys on this great forum. now we're facing a problem relating with usernames and userids.Our web application has 5 different roles, and theres a funtionality needed on a dropdownlist related to the user roles.

we're trying to store users full name and other data, i've seen the tutorials about storing addtional information and everthing is very clear there, the problem now is this code we have already to fill a dropdownlist.

Dim techUsers As String() = Roles.GetUsersInRole("tech")
For Each usr As String In techUsers
DropDownList1.Items.Add(usr)
Next

So basically were looking at storing the user id of the user just created with the create new user wizard to our table where full name is gonna be stored.

table is like this:

userid

full name

and other data required here. etc

so basically, we're filling the dropdownlist with the usernames of the users in the tech rol with the coded i posted above, but we need to instead of showing the username(which is our case is just number) ,show the full name of that users belonging to the tech role, obviouly its just a query, but how to get the full names of users beloning to a specified role? thats the main question and problem we have right now.