ip masquerade

[naxis]

thank you Alexander,
let me be more clear.
         

                                                          --------------
         -------------                                    -            -              -----------------
  ISP    - ADSL      -Gbl IP    -----------192.168.11./24 - FC3        - 192.168.1./24-               -
---------- ROUTER    ------------ Lcl RT  ----------------- DHCP       ------------ ---   PC1         - 
         -           -          -----------               - IP masq    -              -               -
         ------------           local router              -            -              -----------------
                                                          --------------

I want to take off the <Lcl RT> and connect directly the <FC3> to the <ADSL ROUTER> and share 
the internet connection from it so that PC1 can access the internet and <FC3>get the global IP 
directly from <ADSL router>.
I'm using<Lcl RT>because I cannot share the internet with <FC3>.
So I have some other PCs using it for the internet connection.
With my network looking like this ,
PC1 can make communications with skype(http://www.skype.com) but not with MSN messenger or 
Yahoo messenger and cannot access the websites.

I have this in /etc/resolv.conf
nameserver 192.168.11.1

and have this in /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1               naxis localhost.localdomain localhost

I set the GATEWAT of <PC1> to 192.168.1.1(FC3) the nameserver is blank