Thanks for reply! I have found this link before posting my question on this forum. Unfortunately, I cannot edit menu.lst because I cannot find this file anywhere in this system reserved partition or C partition. (In Ubuntu LiveCD I have checked "Show hidden and backup files").
Based on your links, I have decided to create new file menu.lst in the same directory where grldr can be found. Its content is as follows:
title Windows without Loader
find --set-root --ignore-floppies --ignore-cd /win7ldr
Unfortunately, it does not change loader behavior. Those two commands "find ... /bootmgr" I created based on what I could see in editing "Windows without Loader" so nothing I invented.