hi,
it is the CIV4BonusInfos.xml, but i honestly don't know how to change the amounts.
What is interesting is, that all make-happy resources and all something-to-do-with resources have a number in <iPlayer> tag.
The health resources don't. Yet there is still the <iConstAppearance> tag, which has always numbers.
My best guess is (ignoring the <iPlacementOrder>, <iMinAreaSize>, <Rands> and others) however, that its similar to civ3. So that the <iPlayer> number is connected to numbers of players; so that using 100 would mean that with 8 players there are 8 sources of teh specific resource....