Hi Ganimede Dignan,
Please follow the below Link from service market place:
https://websmp201.sap-ag.de/~form/sapnet?_FRAME=CONTAINER&_OBJECT=011000358700000018792010
This page is the central point of information for planning the implementation of Support Package Stacks (SP Stacks) of SAP NetWeaver Composition Environment 7.2.
Also please check the SP09 Stack update guide to find how to apply the patch:
https://websmp201.sap-ag.de/~form/sapnet?_FRAME=CONTAINER&_OBJECT=011000358700000018792010
You can find some useful documents in regarding CE update from SCN page:
http://scn.sap.com/community/bpm/composite-applications
http://wiki.sdn.sap.com/wiki/display/xMII/Netweaver+CE+Basics+for+MII
Let me know if you have any query regarding tool and downloads.SPS guide will help in details step to how to apply the SCA etc via stack xml or SUM.
Feedback pls.
Thanks & Regards,
Haroon Rasheed
AGS