Now, I know Alblaka stated that until there MAY be released a world conversion tool, worlds with IC and IC2 won't be compatible. But here's the thing: let's say I delete all the items I've accumulated by playing IC in my current world. That includes all the placed IC blocks and all the IC items in the chests (this can easily be restored with NBTedit or TooManyItems later). However, there is still the problem of ores - they are pre-generated in the world, and the transition might wipe them as empty block ID's.
Here's my question: I am not sure how the items that are supported by MCForge work, but surely they still have some item ID's and stuff? Will there be a configuration file where one could define the ID# for ores in a world, so that the conversion is harmless, and all the blocks are preserved by simply entering the same ID's for ores in IC2 as there were in IC1?