it has to be rct1 only, it has not been configured for rct2 and probably wont be, there was almost a legal suit due toit being implement according to the one who made the converter so rct2 wont work, rct 1 will.
Rct1 track only [:(] Well doesn't matter that much because the RCT1 tracks really sucked in NL just because RCT builds the tracks extremely rough. But maybe with alot of smoothing and improving you could turn a RCT track into a good NL track.