I guess, you are using outbound and inbound plug to navigate. Then, you can have some parameters defined in the outbound plug which can be acessed via inbound plug of other component.
For comp1's outbound plug define some parameters. For comp2's inbound plug ( for which navigation link is made with above outbound plug) you can see above parameters in the method's signature.
In comp2 there is a default inbound plug for the window create a parameter which u need say para1 .
in comp1 uwill be havind some window in which u have to add the interfaceview (i.e window u want to call ) of comp2 and in the view of comp1 u have to create a outbound plug and then create a navigation link from this to the default plug of interface view .
when on click of ur link ..some eventhandler is called in that fire this plug and pass the parameter value of para1 .
have you tried <a href="http://help.sap.com/saphelp_nw2004s/helpdata/en/22/15a441cd47a209e10000000a155106/frameset.htm">cross-component context mapping</a> ?
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