[argyllcms] how to add patch around bw axis

Hello
I'm new at argyll and at building printer profile... so, I'm sorry if I'll post stupid questions :-) I have find out that if I use targen with default algorithm (OFPS) I didn't get any patch around the b/w axis so I have decided to use this command line: 
./targen -v -d3 -g21 -f441 Target
I got the following distribution of patch:
http://www.danielepennati.com/download/default02.jpg
The problem is that I want a better fine tuning of bw axis and of the nearest colors, something like what you obtain with these tree different targets: http://www.photoactivity.com/public/comersus6F/Dettagli/Profili/Cfrt Asse Grigio.jpg
I want to build a 882 patches test chart with argyll using the default command line ./targen -v -d3 Target and I want to add to this others 441 patch around the bw axis... in this way I'll get a 1323 patch test chart (3 A4 with the i1) 
here is the problem!!! How can I add these new patches?
I have made a tiff file using photoshop with the new 441 patches and I want to get his reference .ti1 file. In this way I'll be able to add the new 441 patches to the "old" 882 made by argyll... 
How can I do this?
I tried to use the scanin command to build the .cht file and the .ti3 file starting from my tiff test chart but I didn't able to do that... 
I'll appreciate your advices!
sorry for my very bad english...
Thank
Daniele

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