Hi John,
Please navigate to PAM for details:
or
https://websmp110.sap-ag.de/pam
then launch PAM and search for EHP2 FOR SAP SCM 7.0
it is obvious that SCM 702 require 720_EXT 64 bit kernel so you have to move your system to 64 bit platform with windows 2008 and mssql 2008 before start with SCM 702 upgrade.
So i would suggest you to please perform system copy procedure to move your system from WIN NT to WIN 2k8 with mssql 2008.
Please use below sap note to perform system copy:
sap note : SAP Note No. 683447, 151603, 551915, 666805,151603, 551915, 960769, 151603
Please do let me know if you require a more info.
Kind Regards, Premsukh