Citrix drive mappings

Citrix is about to be deployed here, and I have a couple quick questions, since I’m a total Citrix retard.

1. Citrix/terminal server is going to need to map back to the c$ share on the client machines for this application to work. Admin rights are needed to access that share. Will the users need local admin rights to the box or will citrix create it’s own account with admin rights when the client is installed?

2. Basically an extension of the above question. I’m concerned about the ports that will need to be open for those drives to be mapped. will it all run via the client and all stay on 1494, or will 137 and 139 need to be open between the client and the server?