simh and rt11 primer.

Hello, I have wanted a PDP11 for years but currently do not have the space for one so I have decided to do the next best thing use simh. I have downloaded simh and the rt11 disk image but I am kind of stuck on where to go. Does anyone know of any sites or documents available online that cover configuration of simh and the installation and use of rt11. I have done some messing around and have managed to boot the rt11 image by using the commands at rl0 rtv53_rl.dsk at rl1 eric_pdp11_rt11.dsk <- This is a file that I intend to do my install to. Is that wrong? Boot rl1. I choose the automatic option but then it wants me to mount a disk in dl1 so that it can backup the media. I try to attach dl1 but I get an error non existent device. If try to create the disk during the install the install just errors out and dies. Any help with this will be most appreciated. Eric