Is it any problem if I install only the HIPER PTF? Another issue is that I couldn't found PTF Cover Letters for SF99097.
SF99097 is not a PTF, it is a PSP document. See IBM's PSP (Preventive Service Planning) documents
Unfortunately SF99097 is the V510 Group HIPER PTF, Last Updated: 21 Mar 2006 and is no longer available. If you have SF99097 on CD the cover letter should be on the CD as well.
This was first published in August 2008