In ALM, is it possible to create a new 'root' structure for Requirements, Test Plan and Test Lab modules?

Our current structure is a not quite organized and very inconsistent in it's usage/structure. We are moving towards a new standardized structure but want to retain existing artifacts. We looked into moving them into an 'archived folder' but it will take a very long time due to peformance (we are looking at increasing memory on the server).

Does QC/ALM allow a 'do-over' with respect to root structure? That would be the simplest approach.

Thanks in advance