DLA FAQ:
http://www.argentuma.com/backup/software/dla.html
DLA
Drive Letter Access
UDF packet writing driver for your CD/DVD drive
DLA is by far the most popular packet writing software, partly because it once was (and still is) available for free with many CD and DVD recording drives. DLA had been originally programmed by Veritas software engineers, and later sold to Sonic Solutions in 2002. Up to the present, both Veritas and Sonic Solutions have released a lot of custom versions of DLA to various OEM manufacturers under various OEM agreements. Most of the branded CD/DVD recording drives, both retail and OEM, now come with their custom version of DLA as a supplemental software on the driver disk. For example, there are HP, IBM, and Sony versions available. Undoubtedly, there are more. All the variations are actually built on the same codebase and technically have very little difference from the original DLA. Sonic Solutions itself sells the original DLA as a part of their $49 CD/DVD recording package.
IBM DLA
Good news, the IBM version of DLA has been reported to work with many non-IBM drives, and is also available for free online download! Download the installation package from IBM web-site and install it on your computer. It may notify you during the installation that your recording drive is not supported because either it's not an IBM branded drive or is an incompatible drive. Just ignore this message and proceed with the installation - IBM DLA still works OK with most of the drives, even if the installation program initially displays a warning like this.
IBM DLA Version 4.95, November 2004, 12 MB
Dell DLA
Another option is to use the Dell DLA package. This is actually a full installer for Sonic DLA 4.95. This package does not pay attention to the hardware platform and it installs on systems with no previous version of DLA installed.
Dell DLA Version 4.95, November 2004, 9 MB
DLA
Basic information...............