Checkout Folder at certain Checkpoint

Hello everyone,

let's say I have the following PTC Project Structure:

A

|->SubfolderOfA

|-->SubSubfolderOfA

|-->AnotherSubSubfolderOfA

B

|->SubfolderOfB

Now "SubfolderOfA" has various Checkpoints, say v1.1, 1.2, 1.3, etc...

Now this is what I'd like to do, all of that <from the command line using si>:

> I'd like to checkout somewhere on my Filesystem (outside of any Sandbox) only "SubfolderOfA" (and all of it's child-Folders) and then switch between its various Checkpoints.

From what I could read in this forum, a build-sandbox could be a good starting point, like:

si createsandbox -P$MKS.pj --projectRevision=1.1

But, supposed the first step is right, how can i switch between the various Checkpoints of "SubfolderOfA"?

Thank you for your help!

Martino