I got to know the US standard library structure is very different from the international one (thank you, Erika). I can't spend time on modification of the manual now, so I publish a premodified version of the ArchiCAD 12 US (2325) standard library:
http://rapidshare.com/files/206917365/Object_Library_12_SM_US.zip. If you use ArchiCAD 12 US, you can skip pages 4-15 of the manual (Modification of ArchiCAD 12 Standard Library) and use the premodified library for replacing your standard library file "Object Library 12.lcf", as described on page 16 (steps 1.14.4-1.14.5).
In addition to that, I have found an error in Microsoft Excel 2003 SP1-SP3. It sometimes slightly modifies numeric values, when it saves into XML table format. For example, 0.123 can be saved as 0.123000000001. So, I modified the macro for bypassing the error. The modified version:
http://rapidshare.com/files/206918959/SelfModification_1_02.zip.
And the final remark. You need to set metric linear dimentions and 4 digits precision before you save data into XLS file (page 20, step 1.8.1). Open Project preferences->Dimensions, set "Linear Dimensions Unit" to meter with 4 decimals, save a dimensions standard (press "Add" button). After that set this dimensions standard in the View Settings dialog in Project Navigator for your schedule before export the schedule into XLS.