Licence question

I have a question regarding licencing of NIS 09.

 

I have a computer with a hard disk of 4 drives namely c,d,e,f.

 

I have two operating systems installed on the same computer ,one on drive C and the other on drive E.

 

Now I have NIS 09 of 3 user licence.

 

I have installed it on one O.S. and want to install it on the other O.S. on the same computer .

 

Now the question is "Will NIS consider it as 2nd licence of allowed 3 eventhough it will be installed on the same

 

hard disk and the same computer ?"