Retry application install in Configuration Manager client with powershell

Hey all, I've had not much luck finding complete examples on the internet that show how to initiate an application download and install on an SCCM client using powershell. I need to use this to create a script to clear the cache, re-download and install the application as it is failing on hundreds of computers.

I found this:

But I don't know how to find the program or package Id. I found examples elsewhere on how it is acquired, but they seem to have access to wmi namespaces that don't exist on my clients.
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byt3Author Commented:
Accidentally stumbled on the solution:

To clear the SCCM client cache

The SCCM client adds a Com service I can use:
$cm = New-Object -ComObject UIResource.UIResourceMgr
$cmcache = $cm.GetCacheInfo()
$cmcache.GetCacheElements() | Foreach-Object {
	$eid = $_.CacheElementId

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To have the SCCM client attempt installation of a deployed application:

The WMI class CCM_Application in the namespace Root\CCM\ClientSDK has an install method. This method takes 6 parameters - ApplicationId, Revision, IsMachineTarget, EnforcePreference, Priority, and IsRebootifNeeded . ApplicationId, Revision and IsMachineTarget  of the application to install can be retrieved by querying the CCM_Application class for the application.

Here's some example code searching for an application with office in the name
$app = Get-WmiObject -Namespace root\CCM\ClientSDK -Class CCM_Application | Where { $_.Name -like "*office*" }
$appid = $app.Id
$appRev = $app.Revision
$appTarget = $app.IsMachineTarget

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The last 3 parameters have the following options:
EnforcePreference: 0 - Immediate, 1 - Non-Business hours or 2 - Admin Schedule
Priority: "Foreground", "High", "Normal" or "Low"
IsRebootIfNeeded: $true or $false

To gain access to the CCM_Application static method 'Install', I did it this way utilizing the variables I created above.
$ccm = [wmiclass]"Root\CCM\ClientSDK:CCM_Application"

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