how to replace with a changeset in RTC source control

Prior to RTC 6.0.4, you could:

1) replace the component with a baseline that came before the change set you want, and then either accept/deliver the change sets from that baseline up to the exact change set you want,

or

2) you could replace the component with a baseline that came after the change set you care about, then discard change sets till you get to the exact change set you want.

However, in RTC 6.0.4 a feature was delivered that makes this use case much easier to accomplish. Using the 'Operation History' view, you can roll-back a workspace (or a specific component in a workspace) to any point in time, meaning you can roll-back to a state which was 'at the exact change set you care about'. You can also create a new repository workspace from that state without impacting the original workspace. To read more about this feature, see:

https://jazz.net/library/article/89462

Ken