Next Availale VMID and Available Templates through API

Hi Guys

I am in the middle of having a module written for WHMCS to allow the automatic creation of Proxmox OpenVZ VM's however I am stuck on 2 issues.

I have banged my head against the API documentation and cannot work it out.

Firstly
How do I query the API to give me the next available VMID to assign the the VM?

and secondly
How do I get a list of available Templates?

Any help or pointers would be very much appreciated.

Regards