How do you Number your songs???

[Rockrz]

I was thinking on numbering my songs using my own numbering system.
Think this is a good idea, or should I use the manufacturer dick number + song number from that disc?

I was kinda thinking about something like this...

For artists starting with the letter A, I could use A001 thru A999
For artists starting with the letter B, I could use B001 thru B999

My master list is going to be listed by artist, and then of course it can
be sorted by song for printing purposes.

Just curious if you guys think there would be some drawbacks down
the road to using this method or not.

Let me know what you guys are doing for numbering in case you
have a better system I might want to consider.