Man I wish the scabbard mod was compatible with the Stuff that makes Geralt's life easier.
Most of the mods that add things to Geralt aren't compatible with one another on the surface, but with a little fiddling, you CAN use them both.
There are several mods that use the def_arealoaded.ncs script; here's how to make them work together, even though they'd normally conflict.
Put ONE of the mods --not the Wolf Companion mod, one of the other ones -- in your Override folder, start the game, and wait until Geralt has been given the item(s). Then save and exit the game and add the files for the second mod to the same folder as the first. The files for the new mod have to be in the same folder, because you'll need to let custom_script for the second mod overwrite the first one in your Override folder. This is okay because you already have the item(s) from the first mod, and it's a different script that adds functionality to the items; all custom_script does is give the items to Geralt. Start your game up again, wait a few seconds, and you should get the second item(s) added. Keep doing this until you have everything you want -- J_Slash's "stuff," my stop-the-rain scroll, whatever you want.
IF you're using the Wolf Companion Mod (I realize that the original poster wasn't, but as long as I'm explaining how to make multiple mods that use the def_arealoaded.ncs script work together, I might as well throw that in), once you have everything you want except for the Wolf Companion mod, THEN add the Wolf Companion mod to the same folder; the custom_script for that will overwrite the other one, but that's okay, because Geralt already has his stuff. Since the wolf gets "added" frequently, he needs to have the custom_script in the Override folder all the time, whereas most items are only added once, so the custom_script for those items can be dispensed with once Geralt has the "stuff" items, the stop-the-rain scroll, and so forth.
Robin Scott has added a Witcher 1 section to his WitcherNexus modding site; you can download my stuff there.
Is there any editor that can actually reset or change a quest status?
Yes! There's a Saved Game editor for The Witcher,
and it allows players to do many things, including changing quests.
The Witcher Vault has it, here: http://witchervault.ign.com/View.php?view=ToolsandUtilities.Detail&id=3
I've thrown in FCR while I was just starting chapter two. I love what the mod does, but that damn cockatrice was nigh impossible to take down.
Do you have any clue to which merchant in Vizima sells those difficulty potions? I know it was Abigail in Chapter 1, but can't find anyone in Ch 2 selling them.
I was playing on normal before modding it and now the difficulty is ridiculous.
Sorry for not getting back sooner, but no, I can't recall where they're sold..you could try searching the official forums through Google and checking out cached links for info.
Alchemists sell them; in Chapter 2, that's probably Kalkstein.