[Printing-user-general] dev order for 2 USB printers, how?

Hello all, 

I am using 2 USB printers( Bubblejet:Canon IP3000 & Laser:KyoceraMita FS1010 )
connected to one computer with CUPS. Both printers are running fine. Anyway I
have following problem.

I need to turn on both printers in the order I have installed them otherwise
the USB devs will get exchanged and CUPS cannot find anymore the devices.

That is really anoying because each time I want to print something with the
bubblejet I need turn on the Laser first.

Is there a possibility to tell the USB system that "/dev/usb/lp0" shall be
always the laser and "/dev/usb/lp1" the bjet?

I am using Slackware 9.1 and 10.2.

Thanks in advance
Best regards......Sorenzo