JAWS (CMP in 2.4.x) support any JDBC driver although you will have to create a mapping for the database. If you do create a mapping please post a patch at source forge so no one else will have to do it.
Just a watch out for you... Centura's jdbc driver has been very bad with a couple of bugs in them. I've not tried it for 3-4 years but i do think it is the same one they are still offering. I might find some old documents about it if you encounter the same bugs...