Hi,
You option is to use Citirx Web Interface, i.e. use Web + Citrix script if you want to test the load balancing which is performed by your Citrix infrastructure.
If the correct work of the load balancing is not a problem for your you can think of using single protocol Citrix script and do some kind of parameterization either in the server ID in the ica file or by parameterizing the server name in ctrx_connect_server.
Additional information is available in the following post:
You can also review the following documents:
1. http://support.openview.hp.com/selfsolve/document/KM537976
2. http://support.openview.hp.com/selfsolve/document/KM816317
In the second KM is described the procedure how to correlate an ica file. It can give you ideas about parameterization as well .
Kind regards,