what is the piece of software necessarily that uses COM Ports to address the hardware? Would the manufacturer have a patch to allow it to instead address USB ports?
If it's a program written for DOS or runs via a command prompt, chances are it won't be able to Address USB ports. In this case, you may need to buy / find newer software that will allow you to accomodate your needs.
Hope that these lead you to some level of satisfaction.
A+ Core Hardware, Software Certified (May 13 2005)
the new beast...
AMD Athlon XP 3200+ Barton running at 2.16 Ghz.
GeForce MX 4000 (mainly takes the load off the main system)
Creative Labs Audigy 24-bit sound.
Some Case from tigerdirect
512 MB Ultra DDR RAM.
80GB Seagate HDD
LiteOn CD-RW / DVD ROM drive.
currently looking at a litescribe drive at staples, due to its ability to label the CD shortly after being burned.