Since you have only one node working and will use this server temporarily, there is no many gotchas, and you can select one of the following options:
1. convert only local disks using the VMware vCenter Converter and after complete the P2V process and make sure the guest OS can boot without problems on virtual machine, map the storage disk as RDM disks to the new virtual machine;
2. convert all the disks (including the disks stored on storage) to virtual disks (.vmdk).
There is another options, like copy files using robocopy, but the two options I listed should work. Take a look at this KB article for some additional help: VMware KB: Using VMware Converter to convert Microsoft Cluster (MSCS) nodes to virtual machines