1) alignment="auto" and width="auto" also work. Are others missing?
2) I would add a note that dataformat #,##0 and probably others listed under the dataformat section fail because they need to be escaped (e.g., dataformat = "##,##0")
3) The syntax of {alignment="right", dataformat = "##,##0"} also works when passing multiple parameters for the format. For example:
SpreadsheetFormatCellRange(objSS, {alignment="right", dataformat = "##,##0"}, 3, 3, lnRowLen, lnColLen)
North America
Europe, Middle East and Africa
Asia Pacific