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Old 11-26-2010, 01:18 PM   #2
SkyDream
Wizard
SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.SkyDream can eat soup with a fork.
 
Posts: 1,377
Karma: 9400
Join Date: Sep 2009
Location: Europe
Device: PRS-650, iPod touch 4G, iPad 3
Have you tried Sigil the free ePub Editor.
I'm using Sigil to modify various tags.

Update:
1) Start Sigil, open epub.
2) Select Extra-> Meta Editor or F8
3) Select <More>
4) If no ISBN field -> select <Add Basic>, add ISBN field
5) Modify ISBN-field
6) Save epub

Last edited by SkyDream; 11-26-2010 at 01:23 PM.
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