Modifying Server Configuration Values in a plan

So, I need to keep track of some persistent server state information as part of a deployment process. Since Buildmaster allows for Server-scoped variables, I figured these would be ideal for keeping track of the information. However, I can't seem to find a way to modify these variables as part of a plan. There seems to be an API method available to do so, but that's kind of a last resort. What would be the best way to modify a server variable as part of a deployment plan?

Product: BuildMaster
Version: 5.8.2

atripp

In BuildMaster v6, there is an operation that you can use to set these:

Set-ConfigurationVariable(
    Variable: <text>,
    Value: <RuntimeValue>,
    [Application: <text>],
    [ApplicationGroup: <text>],
    [Deployable: <text>],
    [Server: <text>],
    [ServerRole: <text>],
    [Environment: <text>]
);

Well, I've been meaning to upgrade anyway. If that's something that's available in v6 means that I'll be doing that sooner rather than later.