Actually, the ' == 1' part is not required for a binary answer. A client either is or isn't a Super Admin, making the answer either 1 or 0. So you can really just use the code:
if(%client.isSuperAdmin)
{
<insert code here>
}
As for your second question, you'd have to know what you wanted the string to be. You can't just say if(%dudename.isWord), lol.