Hi Anand,
I have installed openSUSE 12.1 KDE and VMware perfectly, now I am trying to install wireshark simtrace by usig following 3 steps which are as follows...
Well, you're trying to install a package for suse 11.4 on 12.1, what do you expect ;)
I suggest you check / try the wireshark version number that ships with opensuse 12.1. More recent wireshark releases have the SIM dissector already included and don't need to be patched anymore.
Regards, Harald