Best way to extend extended VMFS partition

I have an ESX 4 U2 server on a DL360 on which I recently increased the size of the raid array by adding two drives.  Now, the ESX host sees the new space but I can't use it to extend the VMFS volume because it is in an extended partition.  I think I need to add the new space to the extended partition first and then extend the VMFS volume to use it.

My question is - what is the best way to extend the extended partition in VMware to include the new space without losing any data that is already on it?

Thanks,

Dan