Hello Matthew,
i would say dead end here.
Please check:
https://websmp207.sap-ag.de/~sapidb/011000358700000540792011E
BOE XI Rel.2 is out of Support since 2010 
Maybe you can find somebody here who has still the installation Libraries of SP5 for you.
But i highly recommend Migrating to BI4 SPS06.
Regards
-Seb.