You should be all set with this, Pete. Open your post and change this line
Code:
seqmax : 2 #Max. sequence number
To this.
Code:
seqmax : 9999 #Max. sequence number
Make sure you leave "omitseq" set @ "0"
I posted a file right from the original post and got
N1
N2
N1
N2
etc.
By changing "seqmax" to 9999 it will go from N1 to N9999 then restart at N1 again. If your controller supports more/less than that, you can change it.
Also, read thru the text towards the top of the post, it may guide you to making more simple changes. Just back up your original first. 
HTH, and if you have more ?'s or !'s let me know.
'Rekd