Id3v1.1...is this close?

Hey, I'm still trying to figure out exactly how to set up the id3v1.1 tag. I've attached the module I made for the fuctions below.

I need to clarify a few things. Tag v1.1 is written in this order right?

Songname
Artist
Album
Year
comment
track
genre

I understand that the comment field is only 28 characters long. But what I don't understand is how to replace the 29th byte with chr$(0) if the track # is only say "1". And if I do this and only have track declared as byte, then if there is another # in the 29th byte (say the track # is 22) then how will it know to read that byte as part of the track? Any info appreciated. Thanks