Im looking for a tool to convert Genesis roms.
Simply i will like to change headers like the teritory i will like to convert Pal roms into US Ntsc.
Also i know that the emus are doing both but me its for a magic drive system and the roms need to be convert or else i got the message the gme is only Pal compatible.
So im looking for a tool that could do that.
Can somebody help?
Thanks in advance!!

I wouldn't count on some magical tool that let's you change a 50Hz PAL into a 60Hz NTSC. Why don't you just download NTSC roms?

It might be possible but I'm only basing this on the fact that I have a PSX game that has a region selector at the start (ie press X for PAL, O for NTSC). Of course, the game itself doesn't work (the zip has a bad CRC) but I reckon that was a problem with the dl.
Or it could be completely unrelated.

If the game supports NTSC, you can just change the territory in the header. If it's like Megaman: Wily Wars, though, that obviously won't work. You could try SegaTool, but it might not have the PAL fix like its cousin SNESTool does. I haven't used it in a while, so I'm not totally sure.