Hi Tibor,
Can't believe I missed that in the Teamwork_Control example! The folder reservation is exactly what we need.
The first item you mentioned is what we were actually trying first, we have an LCF that we want to import into a project. But as this doesn't even seem to be possible via the GUI in Teamwork so we're extracting the LCF and importing the gdls inside it manually. We can do this since we have complete control over the creation of the LCFs so know what will be in them.
Will let you know how it goes.
regards
Brendan