I don't know what you exactly find unclear, but here is a way to do it.
Instructions for making a high quality 256 kbps MP3 disc from lossless source files:
- Make a new playlist. Gather files from the previous playlists or from the main library. Just keep the total playback time below 6 h 10 min. (This time is shown on the bottom status bar when you have no files or all files selected in the playlist.)
- Insert a blank 700 MB disc. (It can be CD-R or CD-RW. I use CD-RW discs, so that I can rewrite them.)
- Open the Burn CD or DVD dialog in Action Window.
- Select Data CD or DVD.
- Give the disc a name. (I usually give it the name of the corresponding playlist. I have named the playlists like BURN1, BURN2, BURN3, etc. I don't delete the lists and I have used them again from time to time.)
- Tick Convert music files to MP3 only and Close disc.
- Click Options. Select MP3 encoder, untick the other two options and click Advanced. Select Bitrate (ABR Encoding) and select Target Bitrate 256 kbps. Tick Restrict encoder to constant bitrate (CBR encoding). Press OK.
- Back in the Burn dialog press Next.
- Drop the playlist into the window.
- Select options. Burn settings are depended on your drive and the playback device. I can't advice on them. The default settings are probably OK. Select None in Folder Naming. Select Custom in File Naming, paste this string there: [Artist]_[Name]_[Album]_[Track #] and tick Prefix list order to the CD filename.
- Select Show list and check that everything is OK.
- Click Burn and wait until the disc is ready.