There are, I think, a couple of things that you need to be aware of. I am not too sure exactly what Part-FCL says but JAR-FCL as was stated that the hours flown on the course counted as training for the test so therefore it seems to me that you would need to have all the solo hours (from whatever the source) prior to undertaking the relevant flight test. The second point (and I certainly don't wish this on you), is that hours flown on test may only be counted as PICUS if the test is passed. A partial or fail means that the entire flight has to be logged as dual.