[SOLVED]Upgrading and Security Upgrade Question

Ive installed fresh copy of Integramod, when i get logged in it tells me i have version 1.0.17, now when i do these upgrades, is their a spesific order i need to do this in? I cant seem to find a stright answer on the forums.
This was the error code whe i tried to use the seurity update. I used all the premomded files to do the update i did 1.0.17 to 1.0.19 then tried to install the security update and i got his message:
Did the frsh install uploaded the1.0.17 update to 2.0.20 then i went in and checked to make sure all the changes were good. Uploaded the security patch seems most of it was installed already witht he 1.0.19 to 2.0.20 update, had to logg in befor I ran the update php and it worked fine.
This was the error code whe i tried to use the seurity update. I used all the premomded files to do the update i did 1.0.17 to 1.0.19 then tried to install the security update and i got his message:
Warning: Cannot modify header information - headers already sent by (output started at /home/solaris-/public_html/ps_upgrade.php:20) in /home/solaris-/public_html/includes/page_header.php on line 947
Warning: Cannot modify header information - headers already sent by (output started at /home/solaris-/public_html/ps_upgrade.php:20) in /home/solaris-/public_html/includes/page_header.php on line 949
Warning: Cannot modify header information - headers already sent by (output started at /home/solaris-/public_html/ps_upgrade.php:20) in /home/solaris-/public_html/includes/page_header.php on line 950
Did the frsh install uploaded the1.0.17 update to 2.0.20 then i went in and checked to make sure all the changes were good. Uploaded the security patch seems most of it was installed already witht he 1.0.19 to 2.0.20 update, had to logg in befor I ran the update php and it worked fine.