Sure, no worries.
1. Download NM00027 DB1 (DVD-ROM).iso.gz from NM00027 Super Dragon Ball Z. and extract the content.
2. Download Chdman and extract to folder.
3. Put NM00027 DB1 (DVD-ROM).iso inside Chdman folder and run CUE-GDI-ISO to CHD bat, if all good you will see percentage of conversion to .chd and new file in the same folder
4. Rename NM00027 DB1 (DVD-ROM).chd to db1.chd and put inside your arcaderoms/superdbz folder, you will need to either overwrite old one or delete before moving.
4 Run the game