I've have an i-Sensys LBP 6020B printer and I use Kubuntu 12.10 64-bit. I've a problem with drivers for Linux 64bit because I can't find anywhere capt linux driver - PPD file for LBP6020B. What am I supposed to do? My printer doesn't print.
After several months of having problems with printers, because we migrated from Windows to Linux in our company which have more than 200 computers... now we found the driver which works on all our printers. The driver is ljet4 , just found some similar model of printer with ljet4 sufix on name and it will work. I wrote more on my blog : http://linuxibos.blogspot.com/2013/01/driver-that-works-on-allmost-all.html
We didn't try on your model but every similar model we have worked very well.