thank's for this update !
Can you tell me how do you convert the RNEG to NG4 database ?
You'll need a text editor and a MD5 checksum calculator.
Find the files versionhazard.txt and hazardareas.lwd in the RNEG file you found somewhere.
Use one of my NG4 uploads as a base.
Open all the files with text editor and figure out how the files refer and relate to eachother (except the .lwd file which is the actual database)
Now, replace the versionhazard.txt and hazardareas.lwd from one of my NG4 uploads with the new files.
Finally, rename all the files with appropriate date and edit every entry in them with appropriate dates and correct (new) file sizes and MD5 checksums.
That should do the job, but you will have to be precise and don't want to miss any one file name or reference as that will corrupt the whole thing.