On Win7, you can create LEAP profile by following these steps:
1)Go to Network and Sharing Center
2)Manage Wireless Networks
4)Manually Create Network Profile
5)Enter network info and choose WPA/WPA2 Enterprise in security
7)Clk on 'Change Connection Settings'
8)Clk on Security tab
9)Enter pertinent info.
If you want to create SSO profiles, you can use ITAdmin tool in similar fashion as it was used on XP.
Hope it helps.
This is quite close to the answer. I had tried your method prior to installing the admin software and the LEAP choice was not available. Once installation, the number of authorization methods increased and I was able to choose LEAP.