What is LBA?

What is the purpose of the LBA? And I've seen many patches (www.xeal.cjb.net) that let you change the LBA of the second session from 11700 to 11702. But for what??? Will the game boot better if I change the LBA?
Another question: I have use cdirip to extract Tdisc.cue TAudio01.raw and TData02.iso from a cdi image, so that I can apply a patch on it (the game is Jet Grind Radio). Now my question: How do I convert the extracted files back to a cdi image (or Nero)?

[Wayne]

That's the ####ting point for the data session. Screw it up (anything other than what it really should be) and you'll have a coaster.

[TheMaskedm0m0]

It also stands for "any future questions from you shall be ignored unless you register to this forum"

~The Masked M0M0~