The check for RC is simple, as it only means checking one byte in VIDEO_TS.IFO. However, this does not mean that there won't be RCE (which is based on commands in the PGCs) - in fact, there probably will be RCE. This would require ImgBurn to parse the IFOs and interpret the commands, which it doesn't do.
So, having the RC in the log is ony half the issue and may not be 100% useful.
Checking on PAL and NTSC should not be difficult, but note that I have seen DVDs (not commercial) with both PAL and NTSC material.
The user can find out all this info for himself in any IFO editor - eg IfoEdit or PgcEdit.
Regards