Using one temp table with another

This is probably easy but I'm stumped.
I have a lengthy query in a sp that produces into a temporary table a list of rental orders for a
particular product needed for a specified time window of usually a few weeks (eg 11/10/2003 to 2/11/2004)
eg

Order no date of order item no qty ordered start rent end rent
1223 11/2/2003 A-1001 10 11/10/2003 12/28/2003
1257 12/5/2003 A-1001 5 12/24/2003 12/30/2003
1288 1/8/2004 A-1001 3 1/21/2004 2/11/2004

etc.

In the same sp, I want to build a table by day from the paramaterized
start and end date of the window which holds the total quantity needed each day for each specific item,
eg how many A-1001s are needed on each day
date qty
11/10/2003 10
11/11/2003 10
11/12/2003 10
*
*

12/24/2003 15
*
2/11/2003 3

Any suggestions apprecited!