You can certainly use PowerShell to download a script from a remote location, update it with local variables, and then execute it. Here's an example of how you can do it:

<code powershell>
# Declare your variables
$localToken = "blahblahblah1234"
$hostname = $(hostname)

# Download the script
Invoke-WebRequest -Uri https://mydomain.com/files/script.ps1 -OutFile C:\temp\script.ps1

# Update the script with your variables
(Get-Content -Path C:\temp\script.ps1) -replace 'LOCAL_TOKEN_PLACEHOLDER', $localToken -replace 'HOSTNAME_PLACEHOLDER', $hostname | Set-Content -Path C:\temp\script.ps1

# Execute the updated script
Invoke-Expression -Command C:\temp\script.ps1
</code>

In this script:
  - ''Get-Content'' is a cmdlet that gets the content of the item at the location specified by the path, such as the text in a file. It reads the content one line at a time, returning an array of objects each of which represents a line of content.
  - ''-replace'' is used to replace the placeholders in the script with your local variables.
  - ''Set-Content'' is a cmdlet that writes or replaces the content in an item with new content.

Please replace ''LOCAL_TOKEN_PLACEHOLDER'' and ''HOSTNAME_PLACEHOLDER'' with the actual placeholders in your script.

''LOCAL_TOKEN_PLACEHOLDER'' and ''HOSTNAME_PLACEHOLDER'' would be placeholders in your ''script.ps1'' file that you intend to replace with actual values. 

Here's a short example of what your ''script.ps1'' might look like before and after replacement:

==== Before Replacement: ====

<code powershell>
# script.ps1
$myToken = "LOCAL_TOKEN_PLACEHOLDER"
$myHostname = "HOSTNAME_PLACEHOLDER"

# Rest of your script...
</code>

==== After Replacement: ====

<code powershell>
# script.ps1
$myToken = "blahblahblah1234"
$myHostname = "my-computer-name"

# Rest of your script...
</code>

In this example, ''LOCAL_TOKEN_PLACEHOLDER'' and ''HOSTNAME_PLACEHOLDER'' are replaced with ''"blahblahblah1234"'' and ''"my-computer-name"'' respectively.

The ''-replace'' operation in PowerShell replaces all occurrences of the specified string value. So, if you have multiple occurrences of ''LOCAL_TOKEN_PLACEHOLDER'' or ''HOSTNAME_PLACEHOLDER'' in your script, they will all be replaced.


Remember, as always, to only run scripts from trusted sources to avoid potential security risks. Let me know if you need further assistance! 😊.