OK, this is crazy and may be extremely unstable, since COD4 dedicated requires around 330 MB to run properly. This server is running only with 128MB RAM! But that's not all, it has all the system files + COD4 in just 128MB, do you understand now how crazy this is?? I only wanted to see if this is indeed possible, and after some optimization i succeeded.
COD4 TDM UK
iw3mp.exe +connect 22.214.171.124:4096
Join and try to play, server may go offline soon, coz that micro setup is not really suited for COD4.