Thanks - sorted now.
Anyone else following this, note it's easy to customise the banks via the Line 6 edit Tone Locker - just drag the ones that you want as a set of 4 into an empty bank against the preferred A B C D configuration and the A B C D buttons will select these. This way too you can have multiple banks i.e. sets of 4 presets.
More info at http://line6.com/support/thread/19462
Thanks ÜG / Line 6