Hi Rob,
If you want to check the application installed on your server regarding IPS or BOE, You can check in following path if UNIX or Windows.
Please refer the below blogs:
Links:
http://bobj.sapbiblog.com/2012/02/15/how-to-determine-your-patch-and-service-pack-in-boe-4-0/
Also refer below Snotes
1602088 - Which version number corresponds to which patch / SP / FP for SAP BusinessObjects BI 4.x ?
Links:
https://service.sap.com/sap/support/notes/1602088
Thanks,
Daya