Scott,
I did try the Musicfinder method that you outlined some while back but I thought that the disadvantages outweighed the advantages.
However, the new T2 has overcome many of these but the biggest thing about using registrations for me (and this is also true if I just use the Ketron XD3 with a lightweight keyboard) is the fact that I just call up a reg using the numeric method (I have a seperate printed list for all my songs with the number reference on it)and the lyrics appear on the screen now that I have invested time in making the bitmaps of them. If the new musicfinder on the T2 can link the text files then this is a great step forward but I'm not sure it does. Let us know when you get yours.
When you also consider that with a reg you can also store things like transpose (for songs I play in Eflat but sing in f# for example, the appropriate vocal harmony setting or reveb/delay for your voice and other different settings like a variation dsp then Registrations are for me
Also using registrations you can use your styles stored on HD - but as you say - te T2 musicfinder overcomes that restriction.
I would like to see a musicfinder function that allows you to index registrations so that you can call them up by name, style, tempo or whatever - that would be the best of both worlds for me.
Regards - Keith