Hi:
Look at the internal help for TAGSETS.EXCELXP -- you will see it in the SAS log if you ask for the doc in a sub-option:
[pre]
ods tagsets.ExcelXP file="C:\Documents and Settings\out.xls"
options(doc='Help');
[/pre]
In the doc in the SAS log, you will find the sheet_name and sheet_interval sub-options. You should be able to use the sheet_interval sub-option to get all 3 procedure outputs in one sheet.
This paper discusses many of the sub-options that affect how the spreadsheet is created (including print headers, print footers, etc):
http://www.nesug.org/proceedings/nesug08/ap/ap06.pdf
cynthia