IBM RFT(8.6.0.3)- Code to handle different browsers

Using browser1(IE version 9) and browser2(firefox33.0.01) I have tried to open browser enter the value in a login page separately - its working fine. If I have that login page opened already in browser1 and then if I'm trying with browser2 to open and enter the value in a login page RFT throwing the Ambiguous error since the objects are available in both the browser.

To open browser seperately I have used the below code

ProcessTestObject Iebrowserobj1 = startBrowser("Internet Explorer",url);

ProcessTestObject Ffbrowserobj2 = startBrowser("Mozilla Firefox",url);

I want to handle objects like for browser1: Iebrowserobj1.text_userId().setText("userID");

I have tried to do with -- text_userId(browser1, DEFAULT).setText("userID"); but its not working.Currenly we are using objects with object map.

Is there any way to handle objects based on the opened browser with the objects stored in object map?