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What do you have in e-xoops? I mean forums and other modules? How much information do you need to move?
I have tried going from e-xoops 1.3 to xoops2 with few problems - but I first copied the database from e-xoops to the same database as xoops2. Then I made little script, which took the information from the e-xoops tables and put it in the xoops2 tables - most fields were the same, with some minor differences.