You can find the documentation to the PowerMedia HMP 4.1 release here www.dialogic.com/.../hmp41lin. In particular you would want to look at the 'System Configuration Guide', 'Software Installation Guide' and 'Release Update' documents. The Release Updates has the latest information.
The HMP 4.1 Linux software can be downloaded from www.dialogic.com/.../hmp-linux. (Please Note: Users are required to have a valid support agreement to obtain the PowerMedia HMP Software).