I am not familiar with Maximo, but do know what SAP is and there is a Datastream program some what similar.
The OP talked about DataStream MP2
http://www.datastream.net/english/products/mp2.aspx
which is a maintenance program.
The problem, as I have experienced it, is that to establish any "system" it takes at least one full time person (possibly more) to setup and maintain the system. Much of the details depend on the size of the company and getting all the necessary information into the system....AS NEEDED.
Personally like MP2, for a price they use to come in and setup a system for you. Grainger use to sell a program they had for $189, this was 8 years ago, that was really easy to use
Here is a list of software, demos, shareware, and freeware:
http://www.plant-maintenance.com/freestuff/index.shtml
Here is one I played around with that seems ok, its $500:
http://www.imonitsoftware.com/
Use the keyword CMMS (Computerized Maintenance Management System) for a google search.