Havn't done law myself for reasons of validity as mentioned by other above. If you do decide to, Im told that by downloading the parts mentioned by outboundjetsetter you will have all the info needed. Alternitivly there is a Trevor Tom IFR law manual which as the ATPL Law in it also.
HF isn't a bad place to start (I think thats what I began with).
For some of the other subjects try
www.atplsolutions.co.nz - Ive done a coulple via these guys and it made things easier.