CDGENPS2 v3.0 support the creation of images CDX (one track an full capacity) and UMCDR (two tracks and unofficial support) with checksum and work perfect in my test. 
The .ISO format in old versions, before created corrupt images. Now it works perfectly. 

In other formats work perfect also (I have tested)

CDGENPS2 v3.0 support also, the conversion of ISO to CDX or UMCDR formats. See in menu -> Advanced -> Create CDX (or UMCDR) from ISO option.

ADVICE: In root folder use ONLY names 8+3 (ISO1). Names of 31 chars is not compatible with filesystem of PS2.