flstep for novaturn and custom tools help please

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Hi,

Having had this machine (it is a very early version), for quite some time now and still not used it much, I have decided that I must learn to programme it myself and learn g-code. I have the set up to use it with the dos software flstep, but I have a problem in that it has a set of pre-set tools but some of them are too big for my expected use, i.e. the boring bars and internal threading tools are too big.
Does anyone know if there is a way to make custom tool configurations for it ? For instance, make a boring bar that has a smaller size ?

Any help would be appreciated.

Thank you.