If the readme is corrupted I would not trust anything from that download. Download another copy. Also, the link I provided did not show a BIOS 73. You should doublecheck and make sure it is not a KT7A only version of the BIOS.
The last BIOS installation I did failed. Long story, basically I did something stupid. I was trying to test a procedure which would protect me from a failed BIOS update but it had the opposite effect. I was playing with the Boot Block protection of the Award BIOS and I did something wrong. Cost me $12 x 2 for two replacement chips and month total waiting from AbitUSA to send me the 2 separate chips. Never had a problem before, in several years of doing BIOS updates until then.
I never did use the new version of the BIOS installer so you better get yourself a copy of the directions.
I don't want to scare you off from doing BIOS updates. The odds of my problems happening to you are very small (unless you try to do a BIOS flash without a video card installed). However, if you'd like insurance against this, their is a product call BIOS savior. This clever device sits between your BIOS chip and the chip socket. If you ever have a BIOS update failure you can boot from the BIOS
Savior which will have a backup copy of your BIOS.