Standalone SRM installation

Hi,

I am trying to install a standalone SRM 5.0 SR2 IDES server with no R/3 ( SAP). I think i have downloaded the necessary softwares and while installing it is asking me to put "solution manager key". Is it nessary to install Solution Manager even for IDES setup? if yes, what the softwares should be downloaded for the basic installation.

What other things would be required to setup standalone IDES SRM 5.0 SR2 server?Can i install the SRM IDES server on the same machine with SM 4.0?

Thanks in advance,

Vivek