Linux 7.1 install>

[MrPlowSpam]

I cannot seem to install Red HAt Linux 7.1 on my Dell Dimension 4500. 1.8ghz, 256 mb ddr sd ram (pc2100), 64 mb nVidia GeForce 2 MX 440, 40 gig NSTF hard drive. It keeps saying that I do not have enough free space to install me partitions when i use the disk druid. I have 20 gig left. I am guessing it is because I have an NSTF file system and not a FAT32 DOS partition. NSTF is acctually better though. Does Linux 8.0 support NSTF? Can anyone help me?