If you just ran the Linux install as a basic install, it completely wiped out your other OS and repartitioned the disk (Windows also works that way), so first, you're going to have to reinstall Windows. Then re-run the Linux install procedure, but choose "custom". You can use either the Linux fdisk utility or RedHat's Disk druid to define your root and swap partitions.
When the install gets to the "LILO" phase, you can specify that your Windows partition be added to the LILO boot menu (Otherwise it will only boot Linux). RedHat 7.2 offers GRUB as an alternative bootloader to LILO, but I'm not familiar with the procedure, and I know LILO works - one system here triple-boots: Windowd 98, Windows NT and Linux.
Your name doesn't conform to the JavaRanch guidelines, BTW, and if you post in other forums you may find that the bartenders there will demand you change it.
You should use your real name. We don't care if it's Bob Smith or Ram Singh, but an obvious alias tends to get slower responses.