Dear developers
With the help of the valued forum members I was able to put id3v2 with foobar into work. That is already a great news but there could be a lot more if...

If the developers would be so kind and would change the way Replaygain info is added to the id3v2 tags. It took a peek into a mp3 with replaygain info in id3v2 and saw you are using multiple COMM frames with Foobar2000 description. This is all good, but not too compatible with other taggers. I mean, not everybody is using the foobar masstagger.
Could it happen by chance that you would consider using PRIV frames for this type of metadata inside id3v2? It would make easier for other taggers to be more compatible with foobar.

Until this happens, we would loose replaygain info when tagging the file with anything else than foobar.

Thanks for reading and considering.

Matyas