Sorry it took me a while to get back to you. I havn't been posting very much and just saw your note today (had to create a new login for myself too).
Anyway! The best way to get more information on Frank is to send away for his IDPF, following instructions given in message 2112 of this forum. I have never tried to send away for an IDPF so I don't know how much information you will be able to get, or how long it might take to reach you. But this is usually the first thing to do when researching those who were killed in action. I've been meaning to send away for an IDPF of my grandpa's platoon commander who was killed the same day that my grandpa was wounded but have never got around to it.
Secondly, you could go to the division website, www.96th-infantry-division.com and sign the guestbook mentioning who you are looking for. Also, read through the guestbook to see if there's anyone who might remember Frank and send them an e-mail. I've actually just been able to meet someone who was in the same platoon as my grandpa by following up leads from the guestbook. Don't be afraid to send out lots of e-mail. All the veterans that I've spoken to have been very kind and helpful to me.
Also, for general information, I would suggest getting a copy of the book "The Deadeyes: The Story of the 96th Infantry Division" by Davidson, Kahl and Willems. This book gives more or less a day-by-day account of the division during the war, and you can follow Frank's unit through the battle and may be able to reconstruct some information. You should be able to get the book through inter-library loan, or from a used book store, or ebay. I would be happy to photocopy a few pages pertaining to April 8th 1945 and mail them to you. Off hand, Frank would likely have been killed during the initial assault on western portion of Kakazu Ridge made by the 1st and 3rd battalions of the 383rd Infantry Regiment on April 8. You can find lots of information online through google.com by searching on "Kakazu Ridge."
You could also try sending away for information to the records center in St. Louis (you should be able to find the address on this forum somewhere), but I wouldn't count on getting anything useful back from them. My grandfather's records were destroyed in the 1973 fire, and since Frank was in the same regiment I would assume that his were destroyed as well. I guess its worth the shot, considering that it only costs you the price of a stamp (there might even be a way to request the information online). It will take the better part of a year for them to get back to you so don't hold your breath either.
Again, sorry for the late reply. Let me know if there's anything more that I can do to help. Best of luck!