Inside the toolslib\toolbox directory you will find the inifile.fp instrument driver that can read/write .INI files.
You can look at it, but I'm not sure this is the solution you want, since this instrument force you to an item-by-item coding, that is: the coding phase is boring and tedious, but you produce regular .INI files.
I'm not sure that this way your program will be faster: in discarding the IniText object the instruments takes a lot of time in freeing memory.
Hope this helps
Roberto