VAX 4000 Model 300 - OS installation Questions

Hello again. I managed to jury rig a null modem cable for my "new" VAX (using a phone cable, some resources I found on Google, mere hours before Jochen posted a link to the same Google search I did :) ), using a phone cable and an old RS232 cable. It ain't pretty, but it works. My next problem is how to get an OS onto this thing. I can easily enough get the distribution CD from Encompass for Hobbyists, however, I lack a means of getting VMS onto the machine, since it only has a TK70 drive, 3 DSSI hard disks, and no SCSI adaptor. I am quite comfortable with setting up over a network (having done many installs of IRIX using Linux as a server), however, I have not found any resources on how to do this with VMS, only with NetBSD. So, what should I do? Has anybody successfully installed VMS using Linux as a server? Or should I invest in a KZQSA controller and use a SUN CD-ROM drive with it (can this be done)? Or perhaps should I invest in a DSSI CD-ROM drive? Does such a beast exist for the VAX 4000/300, even? I'm relatively new to the VAX platform from an administrative perspective, so please bear with me! Thanks! Phil.