You can Integrate VSS with Eclipse using the following steps
Step 1 : Download VSS plugin from http://sourceforge.net/projects/vssplugin/files/
Step 2 : Unzip and put it inside the eclipse\plugins folder
Step 3 : Start Eclipse
Step 4 : Select the project and go to Team >> Share project
Step 5 : Give the VSS server credentials .
Username : VSS user Name
Password : VSS user password
VSS Directory : VSS Sever path which you can browse your network
Source dir : Local folder which is to map with VSS folder
Relative mountpoint : Mapping path in the VSS server
Click on Finish button
Step 6 :
Now you can start using eclipse for all the VSS operation like get latest version from VSS ,Checkout /Checkin VSS file etc..