CTE_REGTEST/Generic/4658790 , unable to follow test instruction, mustang

JDK : mustang
Testcase : CTE_REGTEST/Generic/4658790

ISSUES:
(1) "This test required Netscape 6.2.2 to be installed in tested machine"
Please clarify if this Netscape version is supported for mustang

(2) "3. Open Java Plug-in Control Panel and goto 'Browser' tab",
" You should see 'Netscape 6' is checked ON",
No 'Browser' tab or 'Netscape 6' checkbox

(3) "4. Uncheck it and you should be able to see that all the plug-in files",
" (as mentioned in step 2) from Netscape 6 plugin directory are removed",
"5 Check the 'Netscape 6' checkbox ON on Java Control Panel window",
" you should see the same files (as mentioned in step 2)",
" delivered back into Netscape 6 plugin directory",
Due to the above second issue, this testcase fails.