Load Balancing Central administration web site is a very tricky job which achieving through script next to impossible coz it involves many settings & configurations which needs to be done.
Although very straightforward way for load balancing central admin site is to create multiple central administration web site in the multiple server farm, Run configuration wizard in the server where you want the central admin site to be created.
Steps follows:
Step 1
Run configuration wizard
Step 2:
Click on Advanced Settings
Step 3:
Choose for "Do not disconnect this server from farm" and then click next
Then select the option to "host web site on this server" and then click ok
Step 5:
Verify the central admin url and other details and then click next
Step 6:
Wait till the configuration wizard completes
Step 7:
After the wizard finishes its job you can see the confirmation message and click finish
After the multiple Central admin sites have been created we need to bind it on NLB and we have to specify the NLB's IP and Url in the host entry files of the web front servers.
Cheers
