...i used my old omnia (cr4p) i900's sys.txt + the mods listed here =
at first didn't work. went back and checked end to end. external gps settings must be as prevously said (by real mccoy and maybe others?), then start igo, went to igo's gps and it was there already, found!! and then as if by magic....worked. this is despite trying for half an hour with other combinations. b.t.w. i updated both sys.txt files. from my days with junky i900, i remember there were issues that were quickly resolved by ammending this file, i'm sure it was the one NOT on the sd card. i found "if it ain't broken, don't fix it" so left just the basic settings, for both the omnia and tg01.
strange about the sgh reference in the sys.txt, as if igo was made for it, with all the hard work done for the TMC, i got mine to work on it as well,ofcourse using the o.p.'s (for the OMNIA TMC topic) information.
thanks to ALL!!