I believe hata_ph has also kindly built lyx-1.6.2 for VL6.0. In any event, it is in the VL6.0 testing repository. I have a couple of comments. I don't know how, but I somehow got qt4.5 loaded. I may have been in the testing repository when I loaded qt4 (required by lyx) or the lyx-1.6.2 download may have automatically loaded qt4.5.(Error was that Lyx couldn't find one of the qt4 libraries). In any event, I had to downgrade to qt4.4.1 (in the regular repositories) before lyx-1.6.2 would run.
I don't know if I needed to do this or not, but I also downloaded python when lyx wouldn't work. The lyx.org site says phthon is necessary. Lyx.org also says that lyx requires Texlive or tetex (tetex is in the repositories), so I downloaded that too. Neither fixed the problem (downgrading to qt4-4.4.1 fixed the problem I was having).