Use a text editor to edit the "gamebalancebuilding.txt" file in the "\black & white 2\data\balance\" directory. Upon opening the file, you will see something as follows:

//Balance file for Black and White 2 Last Saved,#2005-08-24 22:58:35#,"probinson"
//Building
AZTEC_ABODE_A 280 0 3.5 80 6 2 3 2 3 2 10 0 1 1 1.5
150 0.7 0.6 0.5 0 0.4 -0.008

Each category (for example, AZTEC_ABODE_A, JAPANESE_ABODE_A, EGYPTIAN_ABODE_A, etc. until GREEK_MIRACLE_ENHANCER) has 26 numbers separated by a tab. These numbers correspond to the building's characteristics. However the only two numbers you need to be concerned about are the first two, which indicate the Wood (first number) and Ore (second number) requirements to construct that particular building. For example, the "AZTEC_ABODE_A" requires 280 wood and 0 ore. You can then in turn edit all the GREEK buildings' cost requirements to whatever desired by changing the first two numbers that appear in each category.

For example, change the following line:

GREEK_TEMPLE 3000 1500 35 85.7142857142857 20 10 20 0
20 0 55 0 1 1 5 50 0.8 0.5 0.5 0 0.6 0.005
to:

GREEK_TEMPLE 1 1 35 85.7142857142857 20 10 20 0 20 0
55 0 1 1 5 50 0.8 0.5 0.5 0 0.6 0.005

The GREEK_TEMPLE originally cost 3000 Wood and 1500 Ore, will now only needs 1 Wood and 1 Ore after the edit. The following 24 numbers remain unchanged. This has been tested and works on v1.1, and can be applied to current games in progress. You can choose to start legitimately and only make use of this cheat at a later level.