> Just so you know I'm not requesting roms, just a question concerning them.
>
> I loaded my entire set of Goodgen roms into Offline List to rename them, and
> weed through the bad dumps, and it shows that I'm missing 900 some odd roms in
> offline list, when I have good dumps of those, according to Goodgen. So what's
> wrong? Do I need to find those roms on my own, or can I fix the ones I have so
> they show up correct in Offline list?
>
> If I have to hunt down those roms down, that's fine, and I won't request them,
> don't worry about that. I just find it frustating, oh well.

I have not used 'Offline List' and this is based on my assumption that it doesn't have specific support for Genesis ROMs, if that's an incorrect assumption then disregard this message.

Basically Genesis ROMs can be in two different formats: BIN & SMD. GoodGen reads the ROM, converts it to BIN format in memory, and compares the checksum to an internal database.
As such it can identify Genesis ROMs regardless of format. Most other ROM management utilities just calculate the CRC32 of the entire file (including headers, which is another problem) and compare it to some external database. So if your ROM is in SMD format, the database you use with these utilities must have the CRC32 for that ROM in SMD format listed in order for it to match your ROM. If the database author included the CRC32 for the ROM in BIN format, it will not match yours.

So you have 3 solutions:

1) Convert all your Genesis ROMs to either BIN or SMD format and get a database for 'Offline List' that includes all the ROMs in one format or the other.
2) Use a ROM manager with support for Genesis ROMs rather than a 'generic' ROM manager.
3) Don't worry about it.