go ahead and load PowerPath, without license you will get basic failover which is exactly what you have ..one HBA connected to multiple paths.
We get a new Windows 2008 Server with a single HBA and connect to a CLARiiON CX4-240 SAN.  We get a single HBA as we just use this Windows Server for handling backup (A DELL TL4000 Tape Drive).  After connecting the HBA to FC Switch, zoning, I attempt to test the connection by allocating a 10GB LUN to it.  However, in Disk Management, I get 2 "DGC RAID 5 Device".  And I can only initialize Disk 1.   I just wonder whether it is correct ?   Besides, is there any point in adding the MPIO feature in that Windows 2008 Server ?
Should I add MPIO feature (W2K8) with a single HBA ?