Subtitle thingy problem here....!!!

Hello,

I'm new to DVD-scene...I have a backup-image of a DVD (import) and would like to add some dutch subtitles and then burn it to a DVD-R.

some questions:
- I have CloneDVD and AnyDVD but how am I sure that the backup will be set to my region...?
- How do I add .srt (or any other) subtitles to the original DVD-backupimage?

thx in advance

grtz Grmbl

R.E.S.P.E.C.T.